1072720 has 80 divisors (see below), whose sum is σ = 2892672. Its totient is φ = 366080.

The previous prime is 1072711. The next prime is 1072733. The reversal of 1072720 is 272701.

1072720 = T₈₁ + T₈₂ + ... + T₁₉₀.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20214 + ... + 20266.

2^1072720 is an apocalyptic number.

1072720 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 1072720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1446336).

1072720 is an abundant number, since it is smaller than the sum of its proper divisors (1819952).

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

1072720 is a wasteful number, since it uses less digits than its factorization.

1072720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 19.

The square root of 1072720 is about 1035.7219704148. The cubic root of 1072720 is about 102.3675067803.

Subtracting from 1072720 its sum of digits (19), we obtain a palindrome (1072701).

The spelling of 1072720 in words is "one million, seventy-two thousand, seven hundred twenty".