12640527 has 6 divisors (see below), whose sum is σ = 18258552. Its totient is φ = 8427012.

The previous prime is 12640517. The next prime is 12640531. The reversal of 12640527 is 72504621.

12640527 is a `hidden beast` number, since 12 + 640 + 5 + 2 + 7 = 666.

It is not a de Polignac number, because 12640527 - 2⁷ = 12640399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12640527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640517) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 702243 + ... + 702260.

It is an arithmetic number, because the mean of its divisors is an integer number (3043092).

Almost surely, 2^12640527 is an apocalyptic number.

12640527 is a deficient number, since it is larger than the sum of its proper divisors (5618025).

12640527 is a wasteful number, since it uses less digits than its factorization.

12640527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404509 (or 1404506 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 12640527 is about 3555.3518813192. The cubic root of 12640527 is about 232.9458942197.

The spelling of 12640527 in words is "twelve million, six hundred forty thousand, five hundred twenty-seven".