125998257 has 48 divisors (see below), whose sum is σ = 216559872. Its totient is φ = 64421280.

The previous prime is 125998241. The next prime is 125998259. The reversal of 125998257 is 752899521.

It is not a de Polignac number, because 125998257 - 2⁴ = 125998241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125998259) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 107758 + ... + 108920.

It is an arithmetic number, because the mean of its divisors is an integer number (4511664).

Almost surely, 2^125998257 is an apocalyptic number.

It is an amenable number.

125998257 is a deficient number, since it is larger than the sum of its proper divisors (90561615).

125998257 is a wasteful number, since it uses less digits than its factorization.

125998257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258 (or 1251 counting only the distinct ones).

The product of its digits is 453600, while the sum is 48.

The square root of 125998257 is about 11224.8945206625. The cubic root of 125998257 is about 501.3274817984.

The spelling of 125998257 in words is "one hundred twenty-five million, nine hundred ninety-eight thousand, two hundred fifty-seven".