125399251 has 8 divisors (see below), whose sum is σ = 126607824. Its totient is φ = 124195200.

The previous prime is 125399233. The next prime is 125399257. The reversal of 125399251 is 152993521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125399251 - 2²¹ = 123302099 is a prime.

It is a super-2 number, since 2×125399251² = 31449944302722002, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125399251.

It is not an unprimeable number, because it can be changed into a prime (125399257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81576 + ... + 83098.

It is an arithmetic number, because the mean of its divisors is an integer number (15825978).

Almost surely, 2^125399251 is an apocalyptic number.

125399251 is a deficient number, since it is larger than the sum of its proper divisors (1208573).

125399251 is a wasteful number, since it uses less digits than its factorization.

125399251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2261.

The product of its digits is 24300, while the sum is 37.

The square root of 125399251 is about 11198.1807004531. The cubic root of 125399251 is about 500.5317689098.

The spelling of 125399251 in words is "one hundred twenty-five million, three hundred ninety-nine thousand, two hundred fifty-one".