125512521727 has 4 divisors (see below), whose sum is σ = 125517181816. Its totient is φ = 125507861640.

The previous prime is 125512521707. The next prime is 125512521763. The reversal of 125512521727 is 727125215521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 727125215521 = 170279 ⋅4270199.

It is a cyclic number.

It is not a de Polignac number, because 125512521727 - 2²³ = 125504133119 is a prime.

It is a super-2 number, since 2×125512521727² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125512521727.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125512521707) 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, 2289408 + ... + 2343589.

It is an arithmetic number, because the mean of its divisors is an integer number (31379295454).

Almost surely, 2^125512521727 is an apocalyptic number.

125512521727 is a deficient number, since it is larger than the sum of its proper divisors (4660089).

125512521727 is an equidigital number, since it uses as much as digits as its factorization.

125512521727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4660088.

The product of its digits is 98000, while the sum is 40.

The spelling of 125512521727 in words is "one hundred twenty-five billion, five hundred twelve million, five hundred twenty-one thousand, seven hundred twenty-seven".