13256140 has 24 divisors (see below), whose sum is σ = 27915552. Its totient is φ = 5287680.

The previous prime is 13256137. The next prime is 13256147. The reversal of 13256140 is 4165231.

It is not an unprimeable number, because it can be changed into a prime (13256147) 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, 9060 + ... + 10420.

It is an arithmetic number, because the mean of its divisors is an integer number (1163148).

Almost surely, 2^13256140 is an apocalyptic number.

13256140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13256140 is an abundant number, since it is smaller than the sum of its proper divisors (14659412).

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

13256140 is a wasteful number, since it uses less digits than its factorization.

13256140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1857 (or 1855 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 13256140 is about 3640.8982408192. The cubic root of 13256140 is about 236.6677202448.

Subtracting from 13256140 its reverse (4165231), we obtain a palindrome (9090909).

The spelling of 13256140 in words is "thirteen million, two hundred fifty-six thousand, one hundred forty".