125515512 has 24 divisors (see below), whose sum is σ = 339938040. Its totient is φ = 41838480.

The previous prime is 125515493. The next prime is 125515513. The reversal of 125515512 is 215515521.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125515513) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 871564 + ... + 871707.

It is an arithmetic number, because the mean of its divisors is an integer number (14164085).

Almost surely, 2^125515512 is an apocalyptic number.

125515512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

125515512 is an abundant number, since it is smaller than the sum of its proper divisors (214422528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125515512 is a wasteful number, since it uses less digits than its factorization.

125515512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743283 (or 1743276 counting only the distinct ones).

The product of its digits is 2500, while the sum is 27.

The square root of 125515512 is about 11203.3705642543. The cubic root of 125515512 is about 500.6864065941.

Subtracting 125515512 from its reverse (215515521), we obtain a palindrome (90000009).

The spelling of 125515512 in words is "one hundred twenty-five million, five hundred fifteen thousand, five hundred twelve".