129646426 has 64 divisors (see below), whose sum is σ = 247726080. Its totient is φ = 49533120.

The previous prime is 129646421. The next prime is 129646459. The reversal of 129646426 is 624646921.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (129646421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1020775 + ... + 1020901.

It is an arithmetic number, because the mean of its divisors is an integer number (3870720).

Almost surely, 2^129646426 is an apocalyptic number.

129646426 is a deficient number, since it is larger than the sum of its proper divisors (118079654).

129646426 is a wasteful number, since it uses less digits than its factorization.

129646426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299.

The product of its digits is 124416, while the sum is 40.

The square root of 129646426 is about 11386.2384482321. The cubic root of 129646426 is about 506.1200197523.

The spelling of 129646426 in words is "one hundred twenty-nine million, six hundred forty-six thousand, four hundred twenty-six".