12987100 has 36 divisors (see below), whose sum is σ = 32209744. Its totient is φ = 4452480.

The previous prime is 12987097. The next prime is 12987103. The reversal of 12987100 is 178921.

12987100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12987097) and next prime (12987103).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12987103) 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, 8577 + ... + 9976.

Almost surely, 2^12987100 is an apocalyptic number.

12987100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12987100 is an abundant number, since it is smaller than the sum of its proper divisors (19222644).

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

12987100 is a wasteful number, since it uses less digits than its factorization.

12987100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18574 (or 18567 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 12987100 is about 3603.7619233240. The cubic root of 12987100 is about 235.0556681157.

The spelling of 12987100 in words is "twelve million, nine hundred eighty-seven thousand, one hundred".