125021800 has 24 divisors (see below), whose sum is σ = 290676150. Its totient is φ = 50008640.

The previous prime is 125021797. The next prime is 125021807. The reversal of 125021800 is 8120521.

It can be written as a sum of positive squares in 3 ways, for example, as 56761156 + 68260644 = 7534^2 + 8262^2 .

It is not an unprimeable number, because it can be changed into a prime (125021807) 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, 312355 + ... + 312754.

Almost surely, 2^125021800 is an apocalyptic number.

125021800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125021800 is an abundant number, since it is smaller than the sum of its proper divisors (165654350).

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

125021800 is a wasteful number, since it uses less digits than its factorization.

125021800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625125 (or 625116 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 125021800 is about 11181.3147706341. The cubic root of 125021800 is about 500.0290649771.

The spelling of 125021800 in words is "one hundred twenty-five million, twenty-one thousand, eight hundred".