125731535 has 4 divisors (see below), whose sum is σ = 150877848. Its totient is φ = 100585224.

The previous prime is 125731519. The next prime is 125731579. The reversal of 125731535 is 535137521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 535137521 = 2671 ⋅200351.

It is a cyclic number.

It is not a de Polignac number, because 125731535 - 2⁴ = 125731519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12573149 + ... + 12573158.

It is an arithmetic number, because the mean of its divisors is an integer number (37719462).

Almost surely, 2^125731535 is an apocalyptic number.

125731535 is a deficient number, since it is larger than the sum of its proper divisors (25146313).

125731535 is an equidigital number, since it uses as much as digits as its factorization.

125731535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25146312.

The product of its digits is 15750, while the sum is 32.

The square root of 125731535 is about 11213.0074021201. The cubic root of 125731535 is about 500.9734834300.

The spelling of 125731535 in words is "one hundred twenty-five million, seven hundred thirty-one thousand, five hundred thirty-five".