129265396 has 36 divisors (see below), whose sum is σ = 250707072. Its totient is φ = 58260384.

The previous prime is 129265373. The next prime is 129265421. The reversal of 129265396 is 693562921.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26845 + ... + 31291.

Almost surely, 2^129265396 is an apocalyptic number.

It is an amenable number.

129265396 is a deficient number, since it is larger than the sum of its proper divisors (121441676).

129265396 is a wasteful number, since it uses less digits than its factorization.

129265396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4520 (or 4505 counting only the distinct ones).

The product of its digits is 174960, while the sum is 43.

The square root of 129265396 is about 11369.4940960449. The cubic root of 129265396 is about 505.6237054009.

The spelling of 129265396 in words is "one hundred twenty-nine million, two hundred sixty-five thousand, three hundred ninety-six".