13491520 has 112 divisors (see below), whose sum is σ = 38770560. Its totient is φ = 4368384.

The previous prime is 13491509. The next prime is 13491529. The reversal of 13491520 is 2519431.

13491520 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 (112).

It is a super-2 number, since 2×13491520² = 364042223820800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13491529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42402 + ... + 42718.

Almost surely, 2^13491520 is an apocalyptic number.

13491520 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 13491520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19385280).

13491520 is an abundant number, since it is smaller than the sum of its proper divisors (25279040).

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

13491520 is a wasteful number, since it uses less digits than its factorization.

13491520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360 (or 350 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 13491520 is about 3673.0804510656. The cubic root of 13491520 is about 238.0602912010.

The spelling of 13491520 in words is "thirteen million, four hundred ninety-one thousand, five hundred twenty".