129288294 has 12 divisors (see below), whose sum is σ = 280124676. Its totient is φ = 43096092.

The previous prime is 129288287. The next prime is 129288311. The reversal of 129288294 is 492882921.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3591324 + ... + 3591359.

It is an arithmetic number, because the mean of its divisors is an integer number (23343723).

Almost surely, 2^129288294 is an apocalyptic number.

129288294 is an abundant number, since it is smaller than the sum of its proper divisors (150836382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129288294 is a wasteful number, since it uses less digits than its factorization.

129288294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7182691 (or 7182688 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 129288294 is about 11370.5010443692. The cubic root of 129288294 is about 505.6535589384.

The spelling of 129288294 in words is "one hundred twenty-nine million, two hundred eighty-eight thousand, two hundred ninety-four".