125729401 has 4 divisors (see below), whose sum is σ = 143690752. Its totient is φ = 107768052.

The previous prime is 125729393. The next prime is 125729447. The reversal of 125729401 is 104927521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 125729401 - 2³ = 125729393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125729101) 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 3 ways as a sum of consecutive naturals, for example, 8980665 + ... + 8980678.

It is an arithmetic number, because the mean of its divisors is an integer number (35922688).

Almost surely, 2^125729401 is an apocalyptic number.

It is an amenable number.

125729401 is a deficient number, since it is larger than the sum of its proper divisors (17961351).

125729401 is an equidigital number, since it uses as much as digits as its factorization.

125729401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17961350.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 125729401 is about 11212.9122443726. The cubic root of 125729401 is about 500.9706491279.

The spelling of 125729401 in words is "one hundred twenty-five million, seven hundred twenty-nine thousand, four hundred one".