12907521 has 12 divisors (see below), whose sum is σ = 20339280. Its totient is φ = 7822680.

The previous prime is 12907519. The next prime is 12907541. The reversal of 12907521 is 12570921.

It is not a de Polignac number, because 12907521 - 2¹ = 12907519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12907541) 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, 65091 + ... + 65288.

It is an arithmetic number, because the mean of its divisors is an integer number (1694940).

Almost surely, 2^12907521 is an apocalyptic number.

12907521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12907521 is a deficient number, since it is larger than the sum of its proper divisors (7431759).

12907521 is a wasteful number, since it uses less digits than its factorization.

12907521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130396 (or 130393 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 12907521 is about 3592.7038564290. The cubic root of 12907521 is about 234.5745796551.

The spelling of 12907521 in words is "twelve million, nine hundred seven thousand, five hundred twenty-one".