13425640 has 16 divisors (see below), whose sum is σ = 30207780. Its totient is φ = 5370240.

The previous prime is 13425623. The next prime is 13425641. The reversal of 13425640 is 4652431.

It can be written as a sum of positive squares in 2 ways, for example, as 12348196 + 1077444 = 3514^2 + 1038^2 .

It is not an unprimeable number, because it can be changed into a prime (13425641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167781 + ... + 167860.

Almost surely, 2^13425640 is an apocalyptic number.

13425640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13425640 is an abundant number, since it is smaller than the sum of its proper divisors (16782140).

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

13425640 is a wasteful number, since it uses less digits than its factorization.

13425640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335652 (or 335648 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 13425640 is about 3664.1015269777. The cubic root of 13425640 is about 237.6721706339.

The spelling of 13425640 in words is "thirteen million, four hundred twenty-five thousand, six hundred forty".