129642498 has 32 divisors (see below), whose sum is σ = 288861120. Its totient is φ = 43099200.

The previous prime is 129642481. The next prime is 129642503. The reversal of 129642498 is 894246921.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18661 + ... + 24647.

It is an arithmetic number, because the mean of its divisors is an integer number (9026910).

Almost surely, 2^129642498 is an apocalyptic number.

129642498 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

129642498 is an abundant number, since it is smaller than the sum of its proper divisors (159218622).

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

129642498 is a wasteful number, since it uses less digits than its factorization.

129642498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6399 (or 6393 counting only the distinct ones).

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

The square root of 129642498 is about 11386.0659580032. The cubic root of 129642498 is about 506.1149082615.

The spelling of 129642498 in words is "one hundred twenty-nine million, six hundred forty-two thousand, four hundred ninety-eight".