129426492 has 24 divisors (see below), whose sum is σ = 325225936. Its totient is φ = 39823488.

The previous prime is 129426469. The next prime is 129426509. The reversal of 129426492 is 294624921.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 129426492.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 414673 + ... + 414984.

Almost surely, 2^129426492 is an apocalyptic number.

129426492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129426492 is an abundant number, since it is smaller than the sum of its proper divisors (195799444).

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

129426492 is a wasteful number, since it uses less digits than its factorization.

129426492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 829677 (or 829675 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 129426492 is about 11376.5764621876. The cubic root of 129426492 is about 505.8336614171.

The spelling of 129426492 in words is "one hundred twenty-nine million, four hundred twenty-six thousand, four hundred ninety-two".