12090681 has 16 divisors (see below), whose sum is σ = 17966400. Its totient is φ = 8036064.

The previous prime is 12090671. The next prime is 12090719. The reversal of 12090681 is 18609021.

It is not a de Polignac number, because 12090681 - 2⁵ = 12090649 is a prime.

It is a super-2 number, since 2×12090681² = 292369134087522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12090641) 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, 14970 + ... + 15756.

It is an arithmetic number, because the mean of its divisors is an integer number (1122900).

Almost surely, 2^12090681 is an apocalyptic number.

It is an amenable number.

12090681 is a deficient number, since it is larger than the sum of its proper divisors (5875719).

12090681 is an equidigital number, since it uses as much as digits as its factorization.

12090681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365 (or 1359 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 12090681 is about 3477.1656561056. The cubic root of 12090681 is about 229.5180899065.

The spelling of 12090681 in words is "twelve million, ninety thousand, six hundred eighty-one".