12690540 has 96 divisors (see below), whose sum is σ = 40158720. Its totient is φ = 3326400.

The previous prime is 12690533. The next prime is 12690553. The reversal of 12690540 is 4509621.

It is a super-2 number, since 2×12690540² = 322099610983200, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38175 + ... + 38505.

It is an arithmetic number, because the mean of its divisors is an integer number (418320).

Almost surely, 2^12690540 is an apocalyptic number.

12690540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12690540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20079360).

12690540 is an abundant number, since it is smaller than the sum of its proper divisors (27468180).

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

12690540 is a wasteful number, since it uses less digits than its factorization.

12690540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420 (or 412 counting only the distinct ones).

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

The square root of 12690540 is about 3562.3784189780. The cubic root of 12690540 is about 233.2527113755.

The spelling of 12690540 in words is "twelve million, six hundred ninety thousand, five hundred forty".