125399997 has 12 divisors (see below), whose sum is σ = 185346304. Its totient is φ = 81655560.

The previous prime is 125399977. The next prime is 125400029. The reversal of 125399997 is 799993521.

125399997 is a `hidden beast` number, since 12 + 539 + 9 + 9 + 97 = 666.

It is not a de Polignac number, because 125399997 - 2¹² = 125395901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125399977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161629 + ... + 162402.

Almost surely, 2^125399997 is an apocalyptic number.

It is an amenable number.

125399997 is a deficient number, since it is larger than the sum of its proper divisors (59946307).

125399997 is a wasteful number, since it uses less digits than its factorization.

125399997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324080 (or 324077 counting only the distinct ones).

The product of its digits is 1377810, while the sum is 54.

The square root of 125399997 is about 11198.2140093856. The cubic root of 125399997 is about 500.5327614622.

The spelling of 125399997 in words is "one hundred twenty-five million, three hundred ninety-nine thousand, nine hundred ninety-seven".