129021662 has 32 divisors (see below), whose sum is σ = 242161920. Its totient is φ = 50086080.

The previous prime is 129021623. The next prime is 129021707. The reversal of 129021662 is 266120921.

It is a happy number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 45914 + ... + 48642.

It is an arithmetic number, because the mean of its divisors is an integer number (7567560).

Almost surely, 2^129021662 is an apocalyptic number.

129021662 is a deficient number, since it is larger than the sum of its proper divisors (113140258).

129021662 is a wasteful number, since it uses less digits than its factorization.

129021662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3056.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 129021662 is about 11358.7702679471. The cubic root of 129021662 is about 505.3057156180.

The spelling of 129021662 in words is "one hundred twenty-nine million, twenty-one thousand, six hundred sixty-two".