129426498 has 20 divisors (see below), whose sum is σ = 290011590. Its totient is φ = 43142112.

The previous prime is 129426469. The next prime is 129426509. The reversal of 129426498 is 894624921.

It can be written as a sum of positive squares in only one way, i.e., 125955729 + 3470769 = 11223^2 + 1863^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 399303 + ... + 399626.

Almost surely, 2^129426498 is an apocalyptic number.

129426498 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

129426498 is an abundant number, since it is smaller than the sum of its proper divisors (160585092).

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

129426498 is an equidigital number, since it uses as much as digits as its factorization.

129426498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 798943 (or 798934 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 129426498 is about 11376.5767258873. The cubic root of 129426498 is about 505.8336692337.

The spelling of 129426498 in words is "one hundred twenty-nine million, four hundred twenty-six thousand, four hundred ninety-eight".