125368729 has 4 divisors (see below), whose sum is σ = 125482084. Its totient is φ = 125255376.

The previous prime is 125368721. The next prime is 125368741. The reversal of 125368729 is 927863521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16646400 + 108722329 = 4080^2 + 10427^2 .

It is a cyclic number.

It is not a de Polignac number, because 125368729 - 2³ = 125368721 is a prime.

It is a super-2 number, since 2×125368729² = 31434636422150882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125368721) 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 3 ways as a sum of consecutive naturals, for example, 55002 + ... + 57235.

It is an arithmetic number, because the mean of its divisors is an integer number (31370521).

Almost surely, 2^125368729 is an apocalyptic number.

It is an amenable number.

125368729 is a deficient number, since it is larger than the sum of its proper divisors (113355).

125368729 is a wasteful number, since it uses less digits than its factorization.

125368729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113354.

The product of its digits is 181440, while the sum is 43.

The square root of 125368729 is about 11196.8178068592. The cubic root of 125368729 is about 500.4911560402.

The spelling of 125368729 in words is "one hundred twenty-five million, three hundred sixty-eight thousand, seven hundred twenty-nine".