13520457 has 24 divisors (see below), whose sum is σ = 21771360. Its totient is φ = 8035200.

The previous prime is 13520453. The next prime is 13520477. The reversal of 13520457 is 75402531.

It is a happy number.

13520457 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13520457 - 2² = 13520453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13520457.

It is not an unprimeable number, because it can be changed into a prime (13520453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 582 + ... + 5232.

It is an arithmetic number, because the mean of its divisors is an integer number (907140).

Almost surely, 2^13520457 is an apocalyptic number.

13520457 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

13520457 is a deficient number, since it is larger than the sum of its proper divisors (8250903).

13520457 is a wasteful number, since it uses less digits than its factorization.

13520457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4693 (or 4690 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 13520457 is about 3677.0174054524. The cubic root of 13520457 is about 238.2303691819.

Adding to 13520457 its reverse (75402531), we get a palindrome (88922988).

The spelling of 13520457 in words is "thirteen million, five hundred twenty thousand, four hundred fifty-seven".