129325247 has 16 divisors (see below), whose sum is σ = 135768960. Its totient is φ = 123082752.

The previous prime is 129325241. The next prime is 129325271. The reversal of 129325247 is 742523921.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 129325247 - 2¹² = 129321151 is a prime.

It is a super-2 number, since 2×129325247² = 33450039023222018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129325241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480629 + ... + 480897.

It is an arithmetic number, because the mean of its divisors is an integer number (8485560).

Almost surely, 2^129325247 is an apocalyptic number.

129325247 is a deficient number, since it is larger than the sum of its proper divisors (6443713).

129325247 is a wasteful number, since it uses less digits than its factorization.

129325247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562.

The product of its digits is 30240, while the sum is 35.

The square root of 129325247 is about 11372.1258786561. The cubic root of 129325247 is about 505.7017294145.

The spelling of 129325247 in words is "one hundred twenty-nine million, three hundred twenty-five thousand, two hundred forty-seven".