12917290 has 32 divisors (see below), whose sum is σ = 23950080. Its totient is φ = 5014464.

The previous prime is 12917273. The next prime is 12917291. The reversal of 12917290 is 9271921.

It is not an unprimeable number, because it can be changed into a prime (12917291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65472 + ... + 65668.

It is an arithmetic number, because the mean of its divisors is an integer number (748440).

Almost surely, 2^12917290 is an apocalyptic number.

12917290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12917290 is a deficient number, since it is larger than the sum of its proper divisors (11032790).

12917290 is a wasteful number, since it uses less digits than its factorization.

12917290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 12917290 is about 3594.0631602686. The cubic root of 12917290 is about 234.6337436415.

The spelling of 12917290 in words is "twelve million, nine hundred seventeen thousand, two hundred ninety".