125139287 has 24 divisors (see below), whose sum is σ = 157927392. Its totient is φ = 98280000.

The previous prime is 125139271. The next prime is 125139299. The reversal of 125139287 is 782931521.

It is not a de Polignac number, because 125139287 - 2⁴ = 125139271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125139287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125139887) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95537 + ... + 96837.

It is an arithmetic number, because the mean of its divisors is an integer number (6580308).

Almost surely, 2^125139287 is an apocalyptic number.

125139287 is a deficient number, since it is larger than the sum of its proper divisors (32788105).

125139287 is a wasteful number, since it uses less digits than its factorization.

125139287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1479 (or 1472 counting only the distinct ones).

The product of its digits is 30240, while the sum is 38.

The square root of 125139287 is about 11186.5672572063. The cubic root of 125139287 is about 500.1856470618.

The spelling of 125139287 in words is "one hundred twenty-five million, one hundred thirty-nine thousand, two hundred eighty-seven".