251398125 has 120 divisors (see below), whose sum is σ = 526331520. Its totient is φ = 114240000.

The previous prime is 251398123. The next prime is 251398181. The reversal of 251398125 is 521893152.

251398125 is a `hidden beast` number, since 251 + 398 + 12 + 5 = 666.

It is not a de Polignac number, because 251398125 - 2¹ = 251398123 is a prime.

It is a super-3 number, since 3×251398125³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 251398125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251398123) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1051756 + ... + 1051994.

It is an arithmetic number, because the mean of its divisors is an integer number (4386096).

Almost surely, 2^251398125 is an apocalyptic number.

251398125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251398125 is an abundant number, since it is smaller than the sum of its proper divisors (274933395).

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

251398125 is a wasteful number, since it uses less digits than its factorization.

251398125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293 (or 275 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 251398125 is about 15855.5392528920. The cubic root of 251398125 is about 631.1326939490.

The spelling of 251398125 in words is "two hundred fifty-one million, three hundred ninety-eight thousand, one hundred twenty-five".