12651690 has 32 divisors (see below), whose sum is σ = 30735936. Its totient is φ = 3332480.

The previous prime is 12651659. The next prime is 12651697. The reversal of 12651690 is 9615621.

It is a super-2 number, since 2×12651690² = 320130519712200, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (12651697) 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, 51 + ... + 5030.

It is an arithmetic number, because the mean of its divisors is an integer number (960498).

Almost surely, 2^12651690 is an apocalyptic number.

12651690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12651690 is an abundant number, since it is smaller than the sum of its proper divisors (18084246).

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

12651690 is a wasteful number, since it uses less digits than its factorization.

12651690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5174.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 12651690 is about 3556.9214216791. The cubic root of 12651690 is about 233.0144464754.

The spelling of 12651690 in words is "twelve million, six hundred fifty-one thousand, six hundred ninety".