129225273 has 16 divisors (see below), whose sum is σ = 175344960. Its totient is φ = 84639744.

The previous prime is 129225263. The next prime is 129225301. The reversal of 129225273 is 372522921.

It is not a de Polignac number, because 129225273 - 2²⁴ = 112448057 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129225223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46713 + ... + 49401.

It is an arithmetic number, because the mean of its divisors is an integer number (10959060).

Almost surely, 2^129225273 is an apocalyptic number.

It is an amenable number.

129225273 is a deficient number, since it is larger than the sum of its proper divisors (46119687).

129225273 is a wasteful number, since it uses less digits than its factorization.

129225273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2968.

The product of its digits is 15120, while the sum is 33.

The square root of 129225273 is about 11367.7294566681. The cubic root of 129225273 is about 505.5713860643.

It can be divided in two parts, 1292 and 25273, that added together give a triangular number (26565 = T₂₃₀).

The spelling of 129225273 in words is "one hundred twenty-nine million, two hundred twenty-five thousand, two hundred seventy-three".