129451294 has 32 divisors (see below), whose sum is σ = 247345920. Its totient is φ = 49465728.

The previous prime is 129451213. The next prime is 129451321. The reversal of 129451294 is 492154921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9792 + ... + 18835.

It is an arithmetic number, because the mean of its divisors is an integer number (7729560).

Almost surely, 2^129451294 is an apocalyptic number.

129451294 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

129451294 is a deficient number, since it is larger than the sum of its proper divisors (117894626).

129451294 is a wasteful number, since it uses less digits than its factorization.

129451294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28672.

The product of its digits is 25920, while the sum is 37.

The square root of 129451294 is about 11377.6664567037. Note that the first 3 decimals coincide. The cubic root of 129451294 is about 505.8659703233.

The spelling of 129451294 in words is "one hundred twenty-nine million, four hundred fifty-one thousand, two hundred ninety-four".