12920100 has 36 divisors (see below), whose sum is σ = 37383024. Its totient is φ = 3445280.

The previous prime is 12920093. The next prime is 12920177. The reversal of 12920100 is 102921.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12920100.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21234 + ... + 21833.

Almost surely, 2^12920100 is an apocalyptic number.

12920100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12920100 is an abundant number, since it is smaller than the sum of its proper divisors (24462924).

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

12920100 is a wasteful number, since it uses less digits than its factorization.

12920100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43084 (or 43077 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 12920100 is about 3594.4540614675. The cubic root of 12920100 is about 234.6507563177.

The spelling of 12920100 in words is "twelve million, nine hundred twenty thousand, one hundred".