125145725731 has 8 divisors (see below), whose sum is σ = 134783201840. Its totient is φ = 115509804192.

The previous prime is 125145725729. The next prime is 125145725759. The reversal of 125145725731 is 137527541521.

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

It is a cyclic number.

It is not a de Polignac number, because 125145725731 - 2¹ = 125145725729 is a prime.

It is a super-2 number, since 2×125145725731² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125145725711) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 218685 + ... + 545998.

It is an arithmetic number, because the mean of its divisors is an integer number (16847900230).

Almost surely, 2^125145725731 is an apocalyptic number.

125145725731 is a deficient number, since it is larger than the sum of its proper divisors (9637476109).

125145725731 is a wasteful number, since it uses less digits than its factorization.

125145725731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777285.

The product of its digits is 294000, while the sum is 43.

The spelling of 125145725731 in words is "one hundred twenty-five billion, one hundred forty-five million, seven hundred twenty-five thousand, seven hundred thirty-one".