12912690 has 64 divisors (see below), whose sum is σ = 37511424. Its totient is φ = 2777088.

The previous prime is 12912689. The next prime is 12912701. The reversal of 12912690 is 9621921.

It is a happy number.

It is a super-2 number, since 2×12912690² = 333475126072200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1762 + ... + 5378.

It is an arithmetic number, because the mean of its divisors is an integer number (586116).

Almost surely, 2^12912690 is an apocalyptic number.

12912690 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 12912690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18755712).

12912690 is an abundant number, since it is smaller than the sum of its proper divisors (24598734).

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

12912690 is a wasteful number, since it uses less digits than its factorization.

12912690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3651.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 12912690 is about 3593.4231590504. The cubic root of 12912690 is about 234.6058883828.

The spelling of 12912690 in words is "twelve million, nine hundred twelve thousand, six hundred ninety".