129126626 has 4 divisors (see below), whose sum is σ = 193689942. Its totient is φ = 64563312.

The previous prime is 129126601. The next prime is 129126631. The reversal of 129126626 is 626621921.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 125328025 + 3798601 = 11195^2 + 1949^2 .

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 as a sum of consecutive naturals, namely, 32281655 + ... + 32281658.

Almost surely, 2^129126626 is an apocalyptic number.

129126626 is a deficient number, since it is larger than the sum of its proper divisors (64563316).

129126626 is an equidigital number, since it uses as much as digits as its factorization.

129126626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64563315.

The product of its digits is 15552, while the sum is 35.

The square root of 129126626 is about 11363.3897231416. The cubic root of 129126626 is about 505.4427069101.

The spelling of 129126626 in words is "one hundred twenty-nine million, one hundred twenty-six thousand, six hundred twenty-six".