12491800 has 24 divisors (see below), whose sum is σ = 29043900. Its totient is φ = 4996640.

The previous prime is 12491789. The next prime is 12491807. The reversal of 12491800 is 819421.

It is a happy number.

12491800 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12491807) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 31030 + ... + 31429.

Almost surely, 2^12491800 is an apocalyptic number.

12491800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12491800 is an abundant number, since it is smaller than the sum of its proper divisors (16552100).

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

12491800 is a wasteful number, since it uses less digits than its factorization.

12491800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62475 (or 62466 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 12491800 is about 3534.3740605657. The cubic root of 12491800 is about 232.0286825418.

The spelling of 12491800 in words is "twelve million, four hundred ninety-one thousand, eight hundred".