129017461 has 4 divisors (see below), whose sum is σ = 129883500. Its totient is φ = 128151424.

The previous prime is 129017453. The next prime is 129017477. The reversal of 129017461 is 164710921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 164710921 = 4877 ⋅33773.

It can be written as a sum of positive squares in 2 ways, for example, as 49914225 + 79103236 = 7065^2 + 8894^2 .

It is a cyclic number.

It is not a de Polignac number, because 129017461 - 2³ = 129017453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129017561) 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, 432796 + ... + 433093.

It is an arithmetic number, because the mean of its divisors is an integer number (32470875).

Almost surely, 2^129017461 is an apocalyptic number.

It is an amenable number.

129017461 is a deficient number, since it is larger than the sum of its proper divisors (866039).

129017461 is an equidigital number, since it uses as much as digits as its factorization.

129017461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866038.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 129017461 is about 11358.5853432547. The cubic root of 129017461 is about 505.3002312357.

The spelling of 129017461 in words is "one hundred twenty-nine million, seventeen thousand, four hundred sixty-one".