125687329 has 4 divisors (see below), whose sum is σ = 126931860. Its totient is φ = 124442800.

The previous prime is 125687321. The next prime is 125687351. The reversal of 125687329 is 923786521.

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 109244304 + 16443025 = 10452^2 + 4055^2 .

It is a cyclic number.

It is not a de Polignac number, because 125687329 - 2³ = 125687321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125687321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 622114 + ... + 622315.

It is an arithmetic number, because the mean of its divisors is an integer number (31732965).

Almost surely, 2^125687329 is an apocalyptic number.

It is an amenable number.

125687329 is a deficient number, since it is larger than the sum of its proper divisors (1244531).

125687329 is a wasteful number, since it uses less digits than its factorization.

125687329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1244530.

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

The square root of 125687329 is about 11211.0360359781. The cubic root of 125687329 is about 500.9147640595.

The spelling of 125687329 in words is "one hundred twenty-five million, six hundred eighty-seven thousand, three hundred twenty-nine".