13520456 has 8 divisors (see below), whose sum is σ = 25350870. Its totient is φ = 6760224.

The previous prime is 13520453. The next prime is 13520477. The reversal of 13520456 is 65402531.

It can be written as a sum of positive squares in only one way, i.e., 10023556 + 3496900 = 3166^2 + 1870^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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

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 as a sum of consecutive naturals, namely, 845021 + ... + 845036.

Almost surely, 2^13520456 is an apocalyptic number.

It is an amenable number.

13520456 is a deficient number, since it is larger than the sum of its proper divisors (11830414).

13520456 is a wasteful number, since it uses less digits than its factorization.

13520456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1690063 (or 1690059 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 13520456 is about 3677.0172694726. The cubic root of 13520456 is about 238.2303633086.

Adding to 13520456 its reverse (65402531), we get a palindrome (78922987).

The spelling of 13520456 in words is "thirteen million, five hundred twenty thousand, four hundred fifty-six".