129551490 has 48 divisors (see below), whose sum is σ = 337524408. Its totient is φ = 34476288.

The previous prime is 129551489. The next prime is 129551501. The reversal of 129551490 is 94155921.

129551490 is a `hidden beast` number, since 12 + 9 + 551 + 4 + 90 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 56295009 + 73256481 = 7503^2 + 8559^2 .

It is a super-2 number, since 2×129551490² = 33567177122440200, which contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 54364 + ... + 56696.

Almost surely, 2^129551490 is an apocalyptic number.

129551490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129551490 is an abundant number, since it is smaller than the sum of its proper divisors (207972918).

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

129551490 is a wasteful number, since it uses less digits than its factorization.

129551490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2963 (or 2960 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 36.

The square root of 129551490 is about 11382.0687926229. The cubic root of 129551490 is about 505.9964509950.

The spelling of 129551490 in words is "one hundred twenty-nine million, five hundred fifty-one thousand, four hundred ninety".