129464865 has 32 divisors (see below), whose sum is σ = 230688000. Its totient is φ = 68889600.

The previous prime is 129464807. The next prime is 129464893. The reversal of 129464865 is 568464921.

129464865 is a `hidden beast` number, since 129 + 46 + 486 + 5 = 666.

It is not a de Polignac number, because 129464865 - 2⁶ = 129464801 is a prime.

It is a super-2 number, since 2×129464865² = 33522302538936450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 129464865.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80065 + ... + 81665.

It is an arithmetic number, because the mean of its divisors is an integer number (7209000).

Almost surely, 2^129464865 is an apocalyptic number.

129464865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

129464865 is a deficient number, since it is larger than the sum of its proper divisors (101223135).

129464865 is a wasteful number, since it uses less digits than its factorization.

129464865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2214 (or 2208 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 129464865 is about 11378.2628287450. The cubic root of 129464865 is about 505.8836471576.

Subtracting from 129464865 its product of digits (414720), we obtain a triangular number (129050145 = T₁₆₀₆₅).

The spelling of 129464865 in words is "one hundred twenty-nine million, four hundred sixty-four thousand, eight hundred sixty-five".