125731402 has 8 divisors (see below), whose sum is σ = 193694436. Its totient is φ = 61166592.

The previous prime is 125731357. The next prime is 125731427. The reversal of 125731402 is 204137521.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 123454321 + 2277081 = 11111^2 + 1509^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 849463 + ... + 849610.

Almost surely, 2^125731402 is an apocalyptic number.

125731402 is a deficient number, since it is larger than the sum of its proper divisors (67963034).

125731402 is a wasteful number, since it uses less digits than its factorization.

125731402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699112.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 125731402 is about 11213.0014715062. The cubic root of 125731402 is about 500.9733067851.

Adding to 125731402 its reverse (204137521), we get a palindrome (329868923).

The spelling of 125731402 in words is "one hundred twenty-five million, seven hundred thirty-one thousand, four hundred two".