125801550 has 72 divisors (see below), whose sum is σ = 386280336. Its totient is φ = 28753920.

The previous prime is 125801549. The next prime is 125801561. The reversal of 125801550 is 55108521.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 16819 + ... + 23118.

Almost surely, 2^125801550 is an apocalyptic number.

125801550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125801550 is an abundant number, since it is smaller than the sum of its proper divisors (260478786).

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

125801550 is a wasteful number, since it uses less digits than its factorization.

125801550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39962 (or 39954 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The square root of 125801550 is about 11216.1290113836. The cubic root of 125801550 is about 501.0664570548.

The spelling of 125801550 in words is "one hundred twenty-five million, eight hundred one thousand, five hundred fifty".