1313520 has 80 divisors (see below), whose sum is σ = 4395552. Its totient is φ = 322560.

The previous prime is 1313467. The next prime is 1313567. The reversal of 1313520 is 253131.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a zygodrome in base 4.

It is a self number, because there is not a number n which added to its sum of digits gives 1313520.

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, 2910 + ... + 3330.

2^1313520 is an apocalyptic number.

1313520 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 1313520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2197776).

1313520 is an abundant number, since it is smaller than the sum of its proper divisors (3082032).

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

1313520 is a wasteful number, since it uses less digits than its factorization.

1313520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450 (or 444 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 1313520 is about 1146.0890017795. The cubic root of 1313520 is about 109.5163337532.

Adding to 1313520 its reverse (253131), we get a palindrome (1566651).

The spelling of 1313520 in words is "one million, three hundred thirteen thousand, five hundred twenty".