125781159 has 32 divisors (see below), whose sum is σ = 202752000. Its totient is φ = 67755744.

The previous prime is 125781133. The next prime is 125781169. The reversal of 125781159 is 951187521.

It is not a de Polignac number, because 125781159 - 2¹⁷ = 125650087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125781169) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 94702 + ... + 96020.

It is an arithmetic number, because the mean of its divisors is an integer number (6336000).

Almost surely, 2^125781159 is an apocalyptic number.

125781159 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

125781159 is a deficient number, since it is larger than the sum of its proper divisors (76970841).

125781159 is a wasteful number, since it uses less digits than its factorization.

125781159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1587.

The product of its digits is 25200, while the sum is 39.

The square root of 125781159 is about 11215.2199710929. The cubic root of 125781159 is about 501.0393832013.

The spelling of 125781159 in words is "one hundred twenty-five million, seven hundred eighty-one thousand, one hundred fifty-nine".