129682426 has 24 divisors (see below), whose sum is σ = 211205340. Its totient is φ = 59512320.

The previous prime is 129682417. The next prime is 129682463. The reversal of 129682426 is 624286921.

It can be written as a sum of positive squares in 6 ways, for example, as 837225 + 128845201 = 915^2 + 11351^2 .

It is a super-2 number, since 2×129682426² = 33635063226490952, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56020 + ... + 58288.

Almost surely, 2^129682426 is an apocalyptic number.

129682426 is a deficient number, since it is larger than the sum of its proper divisors (81522914).

129682426 is a wasteful number, since it uses less digits than its factorization.

129682426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2370 (or 2329 counting only the distinct ones).

The product of its digits is 82944, while the sum is 40.

The square root of 129682426 is about 11387.8191942092. The cubic root of 129682426 is about 506.1668616002.

The spelling of 129682426 in words is "one hundred twenty-nine million, six hundred eighty-two thousand, four hundred twenty-six".