12699090 has 24 divisors (see below), whose sum is σ = 33017868. Its totient is φ = 3386400.

The previous prime is 12699079. The next prime is 12699091. The reversal of 12699090 is 9099621.

It can be written as a sum of positive squares in 2 ways, for example, as 12047841 + 651249 = 3471^2 + 807^2 .

It is a super-2 number, since 2×12699090² = 322533773656200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12699091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70461 + ... + 70640.

Almost surely, 2^12699090 is an apocalyptic number.

12699090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12699090 is an abundant number, since it is smaller than the sum of its proper divisors (20318778).

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

12699090 is a wasteful number, since it uses less digits than its factorization.

12699090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141114 (or 141111 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 12699090 is about 3563.5782578751. The cubic root of 12699090 is about 233.3050827475.

The spelling of 12699090 in words is "twelve million, six hundred ninety-nine thousand, ninety".