129812450 has 24 divisors (see below), whose sum is σ = 241805952. Its totient is φ = 51848720.

The previous prime is 129812387. The next prime is 129812471. The reversal of 129812450 is 54218921.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42887 + ... + 45813.

It is an arithmetic number, because the mean of its divisors is an integer number (10075248).

Almost surely, 2^129812450 is an apocalyptic number.

129812450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129812450 is a deficient number, since it is larger than the sum of its proper divisors (111993502).

129812450 is a wasteful number, since it uses less digits than its factorization.

129812450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3826 (or 3821 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 129812450 is about 11393.5266708776. The cubic root of 129812450 is about 506.3359717836.

The spelling of 129812450 in words is "one hundred twenty-nine million, eight hundred twelve thousand, four hundred fifty".