12540690 has 32 divisors (see below), whose sum is σ = 33442560. Its totient is φ = 3344112.

The previous prime is 12540677. The next prime is 12540691. The reversal of 12540690 is 9604521.

It is a super-2 number, since 2×12540690² = 314537811352200, 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 (12540691) 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, 22954 + ... + 23493.

It is an arithmetic number, because the mean of its divisors is an integer number (1045080).

Almost surely, 2^12540690 is an apocalyptic number.

12540690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12540690 is an abundant number, since it is smaller than the sum of its proper divisors (20901870).

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

12540690 is a wasteful number, since it uses less digits than its factorization.

12540690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46463 (or 46457 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 12540690 is about 3541.2836655654. The cubic root of 12540690 is about 232.3309905966.

The spelling of 12540690 in words is "twelve million, five hundred forty thousand, six hundred ninety".