12621900 has 36 divisors (see below), whose sum is σ = 36520232. Its totient is φ = 3365760.

The previous prime is 12621899. The next prime is 12621901. The reversal of 12621900 is 912621.

It is an interprime number because it is at equal distance from previous prime (12621899) and next prime (12621901).

It is a super-2 number, since 2×12621900² = 318624719220000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12621901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20737 + ... + 21336.

Almost surely, 2^12621900 is an apocalyptic number.

12621900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12621900 is an abundant number, since it is smaller than the sum of its proper divisors (23898332).

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

12621900 is a wasteful number, since it uses less digits than its factorization.

12621900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42090 (or 42083 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 12621900 is about 3552.7313436284. The cubic root of 12621900 is about 232.8314154413.

The spelling of 12621900 in words is "twelve million, six hundred twenty-one thousand, nine hundred".