12105690 has 32 divisors (see below), whose sum is σ = 29318976. Its totient is φ = 3198720.

The previous prime is 12105647. The next prime is 12105733. The reversal of 12105690 is 9650121.

12105690 = 1554² + 1555² + ... + 1558².

It is an interprime number because it is at equal distance from previous prime (12105647) and next prime (12105733).

It is a super-2 number, since 2×12105690² = 293095460752200, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12105690.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1605 + ... + 5175.

It is an arithmetic number, because the mean of its divisors is an integer number (916218).

Almost surely, 2^12105690 is an apocalyptic number.

12105690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12105690 is an abundant number, since it is smaller than the sum of its proper divisors (17213286).

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

12105690 is a wasteful number, since it uses less digits than its factorization.

12105690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3694.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 12105690 is about 3479.3232100511. The cubic root of 12105690 is about 229.6130228705.

The spelling of 12105690 in words is "twelve million, one hundred five thousand, six hundred ninety".