129342426 has 32 divisors (see below), whose sum is σ = 274555008. Its totient is φ = 40481280.

The previous prime is 129342397. The next prime is 129342427. The reversal of 129342426 is 624243921.

It is not an unprimeable number, because it can be changed into a prime (129342427) 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, 50046 + ... + 52566.

It is an arithmetic number, because the mean of its divisors is an integer number (8579844).

Almost surely, 2^129342426 is an apocalyptic number.

129342426 is an abundant number, since it is smaller than the sum of its proper divisors (145212582).

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

129342426 is a wasteful number, since it uses less digits than its factorization.

129342426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3046.

The product of its digits is 20736, while the sum is 33.

The square root of 129342426 is about 11372.8811652984. The cubic root of 129342426 is about 505.7241201582.

The spelling of 129342426 in words is "one hundred twenty-nine million, three hundred forty-two thousand, four hundred twenty-six".