129321490 has 8 divisors (see below), whose sum is σ = 232778700. Its totient is φ = 51728592.

The previous prime is 129321463. The next prime is 129321509. The reversal of 129321490 is 94123921.

It can be written as a sum of positive squares in 2 ways, for example, as 119443041 + 9878449 = 10929^2 + 3143^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6466065 + ... + 6466084.

Almost surely, 2^129321490 is an apocalyptic number.

129321490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129321490 is a deficient number, since it is larger than the sum of its proper divisors (103457210).

129321490 is a wasteful number, since it uses less digits than its factorization.

129321490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12932156.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 129321490 is about 11371.9606928621. The cubic root of 129321490 is about 505.6968323563.

The spelling of 129321490 in words is "one hundred twenty-nine million, three hundred twenty-one thousand, four hundred ninety".