125991523 has 8 divisors (see below), whose sum is σ = 144356192. Its totient is φ = 107718336.

The previous prime is 125991521. The next prime is 125991529. The reversal of 125991523 is 325199521.

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 125991523 - 2¹ = 125991521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125991521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19890 + ... + 25447.

It is an arithmetic number, because the mean of its divisors is an integer number (18044524).

Almost surely, 2^125991523 is an apocalyptic number.

125991523 is a deficient number, since it is larger than the sum of its proper divisors (18364669).

125991523 is an equidigital number, since it uses as much as digits as its factorization.

125991523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45741.

The product of its digits is 24300, while the sum is 37.

The square root of 125991523 is about 11224.5945583794. The cubic root of 125991523 is about 501.3185504595.

The spelling of 125991523 in words is "one hundred twenty-five million, nine hundred ninety-one thousand, five hundred twenty-three".