12697290 has 128 divisors (see below), whose sum is σ = 36771840. Its totient is φ = 3110400.

The previous prime is 12697261. The next prime is 12697303. The reversal of 12697290 is 9279621.

It is a super-2 number, since 2×12697290² = 322442346688200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 309670 + ... + 309710.

It is an arithmetic number, because the mean of its divisors is an integer number (287280).

Almost surely, 2^12697290 is an apocalyptic number.

12697290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12697290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18385920).

12697290 is an abundant number, since it is smaller than the sum of its proper divisors (24074550).

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

12697290 is a wasteful number, since it uses less digits than its factorization.

12697290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 12697290 is about 3563.3256937866. The cubic root of 12697290 is about 233.2940591495.

The spelling of 12697290 in words is "twelve million, six hundred ninety-seven thousand, two hundred ninety".