13687456 has 12 divisors (see below), whose sum is σ = 26947242. Its totient is φ = 6843712.

The previous prime is 13687439. The next prime is 13687463. The reversal of 13687456 is 65478631.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 13571856 + 115600 = 3684^2 + 340^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213835 + ... + 213898.

Almost surely, 2^13687456 is an apocalyptic number.

13687456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13687456 is a deficient number, since it is larger than the sum of its proper divisors (13259786).

13687456 is an equidigital number, since it uses as much as digits as its factorization.

13687456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427743 (or 427735 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 13687456 is about 3699.6562002435. The cubic root of 13687456 is about 239.2071988080.

The spelling of 13687456 in words is "thirteen million, six hundred eighty-seven thousand, four hundred fifty-six".