129869542 has 12 divisors (see below), whose sum is σ = 214124148. Its totient is φ = 59031500.

The previous prime is 129869527. The next prime is 129869573. The reversal of 129869542 is 245968921.

It is a junction number, because it is equal to n+sod(n) for n = 129869492 and 129869501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 268084 + ... + 268567.

It is an arithmetic number, because the mean of its divisors is an integer number (17843679).

Almost surely, 2^129869542 is an apocalyptic number.

129869542 is a deficient number, since it is larger than the sum of its proper divisors (84254606).

129869542 is a wasteful number, since it uses less digits than its factorization.

129869542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536675 (or 536664 counting only the distinct ones).

The product of its digits is 311040, while the sum is 46.

The square root of 129869542 is about 11396.0318532373. The cubic root of 129869542 is about 506.4101903875.

The spelling of 129869542 in words is "one hundred twenty-nine million, eight hundred sixty-nine thousand, five hundred forty-two".