125931729 has 32 divisors (see below), whose sum is σ = 210309120. Its totient is φ = 65116800.

The previous prime is 125931727. The next prime is 125931761. The reversal of 125931729 is 927139521.

It is not a de Polignac number, because 125931729 - 2¹ = 125931727 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (125931721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54069 + ... + 56349.

It is an arithmetic number, because the mean of its divisors is an integer number (6572160).

Almost surely, 2^125931729 is an apocalyptic number.

It is an amenable number.

125931729 is a deficient number, since it is larger than the sum of its proper divisors (84377391).

125931729 is a wasteful number, since it uses less digits than its factorization.

125931729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2541.

The product of its digits is 34020, while the sum is 39.

The square root of 125931729 is about 11221.9307162360. The cubic root of 125931729 is about 501.2392314069.

The spelling of 125931729 in words is "one hundred twenty-five million, nine hundred thirty-one thousand, seven hundred twenty-nine".