12545640 has 48 divisors (see below), whose sum is σ = 40774500. Its totient is φ = 3345408.

The previous prime is 12545633. The next prime is 12545641. The reversal of 12545640 is 4654521.

12545640 is a `hidden beast` number, since 12 + 5 + 4 + 5 + 640 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 10850436 + 1695204 = 3294^2 + 1302^2 .

It is not an unprimeable number, because it can be changed into a prime (12545641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17065 + ... + 17784.

Almost surely, 2^12545640 is an apocalyptic number.

12545640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12545640 is an abundant number, since it is smaller than the sum of its proper divisors (28228860).

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

12545640 is a wasteful number, since it uses less digits than its factorization.

12545640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34866 (or 34859 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 12545640 is about 3541.9824957219. The cubic root of 12545640 is about 232.3615547608.

The spelling of 12545640 in words is "twelve million, five hundred forty-five thousand, six hundred forty".