13520656 has 10 divisors (see below), whose sum is σ = 26196302. Its totient is φ = 6760320.

The previous prime is 13520653. The next prime is 13520659. The reversal of 13520656 is 65602531.

It is an interprime number because it is at equal distance from previous prime (13520653) and next prime (13520659).

It can be written as a sum of positive squares in only one way, i.e., 8503056 + 5017600 = 2916^2 + 2240^2 .

It is not an unprimeable number, because it can be changed into a prime (13520653) 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, 422505 + ... + 422536.

Almost surely, 2^13520656 is an apocalyptic number.

13520656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13520656 is a deficient number, since it is larger than the sum of its proper divisors (12675646).

13520656 is an equidigital number, since it uses as much as digits as its factorization.

13520656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845049 (or 845043 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 28.

The square root of 13520656 is about 3677.0444653281. The cubic root of 13520656 is about 238.2315379691.

The spelling of 13520656 in words is "thirteen million, five hundred twenty thousand, six hundred fifty-six".