125454072731 has 4 divisors (see below), whose sum is σ = 135104386032. Its totient is φ = 115803759432.

The previous prime is 125454072713. The next prime is 125454072817. The reversal of 125454072731 is 137270454521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125454072731 - 2¹⁰ = 125454071707 is a prime.

It is a super-2 number, since 2×125454072731² (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 (125454071731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4825156631 + ... + 4825156656.

It is an arithmetic number, because the mean of its divisors is an integer number (33776096508).

Almost surely, 2^125454072731 is an apocalyptic number.

125454072731 is a deficient number, since it is larger than the sum of its proper divisors (9650313301).

125454072731 is an equidigital number, since it uses as much as digits as its factorization.

125454072731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9650313300.

The product of its (nonzero) digits is 235200, while the sum is 41.

The spelling of 125454072731 in words is "one hundred twenty-five billion, four hundred fifty-four million, seventy-two thousand, seven hundred thirty-one".