129056965 has 4 divisors (see below), whose sum is σ = 154868364. Its totient is φ = 103245568.

The previous prime is 129056953. The next prime is 129057001. The reversal of 129056965 is 569650921.

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 92659876 + 36397089 = 9626^2 + 6033^2 .

It is a cyclic number.

It is not a de Polignac number, because 129056965 - 2²³ = 120668357 is a prime.

It is a super-2 number, since 2×129056965² = 33311400430022450, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12905692 + ... + 12905701.

It is an arithmetic number, because the mean of its divisors is an integer number (38717091).

Almost surely, 2^129056965 is an apocalyptic number.

It is an amenable number.

129056965 is a deficient number, since it is larger than the sum of its proper divisors (25811399).

129056965 is an equidigital number, since it uses as much as digits as its factorization.

129056965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25811398.

The product of its (nonzero) digits is 145800, while the sum is 43.

The square root of 129056965 is about 11360.3241591074. The cubic root of 129056965 is about 505.3517987863.

The spelling of 129056965 in words is "one hundred twenty-nine million, fifty-six thousand, nine hundred sixty-five".