129970026 has 12 divisors (see below), whose sum is σ = 281601762. Its totient is φ = 43323336.

The previous prime is 129970019. The next prime is 129970063. The reversal of 129970026 is 620079921.

It can be written as a sum of positive squares in only one way, i.e., 104960025 + 25010001 = 10245^2 + 5001^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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 5 ways as a sum of consecutive naturals, for example, 3610261 + ... + 3610296.

Almost surely, 2^129970026 is an apocalyptic number.

129970026 is an abundant number, since it is smaller than the sum of its proper divisors (151631736).

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

129970026 is a wasteful number, since it uses less digits than its factorization.

129970026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7220565 (or 7220562 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 129970026 is about 11400.4397283614. The cubic root of 129970026 is about 506.5407650200.

The spelling of 129970026 in words is "one hundred twenty-nine million, nine hundred seventy thousand, twenty-six".