129611457 has 6 divisors (see below), whose sum is σ = 187216562. Its totient is φ = 86407632.

The previous prime is 129611437. The next prime is 129611467. The reversal of 129611457 is 754116921.

It can be written as a sum of positive squares in only one way, i.e., 68161536 + 61449921 = 8256^2 + 7839^2 .

It is not a de Polignac number, because 129611457 - 2⁶ = 129611393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129611437) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7200628 + ... + 7200645.

Almost surely, 2^129611457 is an apocalyptic number.

It is an amenable number.

129611457 is a deficient number, since it is larger than the sum of its proper divisors (57605105).

129611457 is a wasteful number, since it uses less digits than its factorization.

129611457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14401279 (or 14401276 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 129611457 is about 11384.7027629183. The cubic root of 129611457 is about 506.0745110997.

The spelling of 129611457 in words is "one hundred twenty-nine million, six hundred eleven thousand, four hundred fifty-seven".