129940522 has 8 divisors (see below), whose sum is σ = 200178756. Its totient is φ = 63214272.

The previous prime is 129940507. The next prime is 129940523. The reversal of 129940522 is 225049921.

It can be written as a sum of positive squares in 2 ways, for example, as 115584001 + 14356521 = 10751^2 + 3789^2 .

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

It is not an unprimeable number, because it can be changed into a prime (129940523) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 877903 + ... + 878050.

Almost surely, 2^129940522 is an apocalyptic number.

129940522 is a deficient number, since it is larger than the sum of its proper divisors (70238234).

129940522 is a wasteful number, since it uses less digits than its factorization.

129940522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755992.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 129940522 is about 11399.1456697421. The cubic root of 129940522 is about 506.5024328235.

The spelling of 129940522 in words is "one hundred twenty-nine million, nine hundred forty thousand, five hundred twenty-two".