125210540291 has 4 divisors (see below), whose sum is σ = 125212243584. Its totient is φ = 125208837000.

The previous prime is 125210540261. The next prime is 125210540369. The reversal of 125210540291 is 192045012521.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125210540291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125210540201) 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, 736160 + ... + 890141.

It is an arithmetic number, because the mean of its divisors is an integer number (31303060896).

Almost surely, 2^125210540291 is an apocalyptic number.

125210540291 is a deficient number, since it is larger than the sum of its proper divisors (1703293).

125210540291 is an equidigital number, since it uses as much as digits as its factorization.

125210540291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703292.

The product of its (nonzero) digits is 7200, while the sum is 32.

The spelling of 125210540291 in words is "one hundred twenty-five billion, two hundred ten million, five hundred forty thousand, two hundred ninety-one".