1026720 has 144 divisors (see below), whose sum is σ = 3773952. Its totient is φ = 253440.

The previous prime is 1026709. The next prime is 1026733. The reversal of 1026720 is 276201.

It is a happy number.

1026720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-4 number, since 4×1026720⁴ (a number of 25 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 4 and base 16.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 1026693 and 1026702.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33105 + ... + 33135.

It is an arithmetic number, because the mean of its divisors is an integer number (26208).

2^1026720 is an apocalyptic number.

1026720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1026720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1886976).

1026720 is an abundant number, since it is smaller than the sum of its proper divisors (2747232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1026720 is a wasteful number, since it uses less digits than its factorization.

1026720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 1026720 is about 1013.2719279641. The cubic root of 1026720 is about 100.8828494972.

It can be divided in two parts, 1026 and 720, that multiplied together give a triangular number (738720 = T₁₂₁₅).

The spelling of 1026720 in words is "one million, twenty-six thousand, seven hundred twenty".