12557500 has 30 divisors (see below), whose sum is σ = 27466208. Its totient is φ = 5022000.

The previous prime is 12557491. The next prime is 12557549. The reversal of 12557500 is 575521.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 12 + ... + 5011.

Almost surely, 2^12557500 is an apocalyptic number.

12557500 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 12557500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13733104).

12557500 is an abundant number, since it is smaller than the sum of its proper divisors (14908708).

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

12557500 is an equidigital number, since it uses as much as digits as its factorization.

12557500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5047 (or 5030 counting only the distinct ones).

The product of its (nonzero) digits is 1750, while the sum is 25.

The square root of 12557500 is about 3543.6563038760. The cubic root of 12557500 is about 232.4347525702.

The spelling of 12557500 in words is "twelve million, five hundred fifty-seven thousand, five hundred".