125015550 has 48 divisors (see below), whose sum is σ = 338228352. Its totient is φ = 30306400.

The previous prime is 125015537. The next prime is 125015551. The reversal of 125015550 is 55510521.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 125015550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125015551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36234 + ... + 39533.

It is an arithmetic number, because the mean of its divisors is an integer number (7046424).

Almost surely, 2^125015550 is an apocalyptic number.

125015550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125015550 is an abundant number, since it is smaller than the sum of its proper divisors (213212802).

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

125015550 is a wasteful number, since it uses less digits than its factorization.

125015550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75793 (or 75788 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 24.

The square root of 125015550 is about 11181.0352830138. The cubic root of 125015550 is about 500.0207324737.

The spelling of 125015550 in words is "one hundred twenty-five million, fifteen thousand, five hundred fifty".