1303920 has 60 divisors (see below), whose sum is σ = 4381416. Its totient is φ = 347520.

The previous prime is 1303919. The next prime is 1303931. The reversal of 1303920 is 293031.

It is a tau number, because it is divible by the number of its divisors (60).

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

It is a junction number, because it is equal to n+sod(n) for n = 1303893 and 1303902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 186 + ... + 1625.

2^1303920 is an apocalyptic number.

1303920 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 1303920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2190708).

1303920 is an abundant number, since it is smaller than the sum of its proper divisors (3077496).

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

1303920 is a wasteful number, since it uses less digits than its factorization.

1303920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830 (or 1821 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 1303920 is about 1141.8931648801. The cubic root of 1303920 is about 109.2488772059.

Adding to 1303920 its reverse (293031), we get a palindrome (1596951).

The spelling of 1303920 in words is "one million, three hundred three thousand, nine hundred twenty".