13240056 has 32 divisors (see below), whose sum is σ = 33218640. Its totient is φ = 4397568.

The previous prime is 13240049. The next prime is 13240057. The reversal of 13240056 is 65004231.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13240057) 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 in 7 ways as a sum of consecutive naturals, for example, 7270 + ... + 8906.

Almost surely, 2^13240056 is an apocalyptic number.

It is an amenable number.

13240056 is an abundant number, since it is smaller than the sum of its proper divisors (19978584).

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

13240056 is a wasteful number, since it uses less digits than its factorization.

13240056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1983 (or 1979 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 13240056 is about 3638.6887748199. The cubic root of 13240056 is about 236.5719632551.

Adding to 13240056 its reverse (65004231), we get a palindrome (78244287).

The spelling of 13240056 in words is "thirteen million, two hundred forty thousand, fifty-six".