129639462 has 16 divisors (see below), whose sum is σ = 261145920. Its totient is φ = 42901992.

The previous prime is 129639409. The next prime is 129639463. The reversal of 129639462 is 264936921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129639463) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 76888 + ... + 78555.

It is an arithmetic number, because the mean of its divisors is an integer number (16321620).

Almost surely, 2^129639462 is an apocalyptic number.

129639462 is an abundant number, since it is smaller than the sum of its proper divisors (131506458).

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

129639462 is a wasteful number, since it uses less digits than its factorization.

129639462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155587.

The product of its digits is 139968, while the sum is 42.

The square root of 129639462 is about 11385.9326363720. The cubic root of 129639462 is about 506.1109574561.

The spelling of 129639462 in words is "one hundred twenty-nine million, six hundred thirty-nine thousand, four hundred sixty-two".