12907385 has 4 divisors (see below), whose sum is σ = 15488868. Its totient is φ = 10325904.

The previous prime is 12907381. The next prime is 12907387. The reversal of 12907385 is 58370921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7795264 + 5112121 = 2792^2 + 2261^2 .

It is a cyclic number.

It is not a de Polignac number, because 12907385 - 2² = 12907381 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12907381) 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, 1290734 + ... + 1290743.

It is an arithmetic number, because the mean of its divisors is an integer number (3872217).

Almost surely, 2^12907385 is an apocalyptic number.

It is an amenable number.

12907385 is a deficient number, since it is larger than the sum of its proper divisors (2581483).

12907385 is an equidigital number, since it uses as much as digits as its factorization.

12907385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2581482.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 12907385 is about 3592.6849291303. The cubic root of 12907385 is about 234.5737557877.

The spelling of 12907385 in words is "twelve million, nine hundred seven thousand, three hundred eighty-five".