129766761 has 12 divisors (see below), whose sum is σ = 187761600. Its totient is φ = 86363160.

The previous prime is 129766699. The next prime is 129766799. The reversal of 129766761 is 167667921.

It is a happy number.

It is not a de Polignac number, because 129766761 - 2⁹ = 129766249 is a prime.

It is a super-2 number, since 2×129766761² = 33678824520862242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129765761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6645 + ... + 17426.

It is an arithmetic number, because the mean of its divisors is an integer number (15646800).

Almost surely, 2^129766761 is an apocalyptic number.

It is an amenable number.

129766761 is a deficient number, since it is larger than the sum of its proper divisors (57994839).

129766761 is a wasteful number, since it uses less digits than its factorization.

129766761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24676 (or 24673 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 129766761 is about 11391.5214523785. The cubic root of 129766761 is about 506.2765612036.

The spelling of 129766761 in words is "one hundred twenty-nine million, seven hundred sixty-six thousand, seven hundred sixty-one".