129418042 has 16 divisors (see below), whose sum is σ = 221358312. Its totient is φ = 56217600.

The previous prime is 129417961. The next prime is 129418073. The reversal of 129418042 is 240814921.

It can be written as a sum of positive squares in 4 ways, for example, as 118135161 + 11282881 = 10869^2 + 3359^2 .

It is a super-2 number, since 2×129418042² = 33498059190227528, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129417995 and 129418013.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145959 + ... + 146842.

Almost surely, 2^129418042 is an apocalyptic number.

129418042 is a deficient number, since it is larger than the sum of its proper divisors (91940270).

129418042 is a wasteful number, since it uses less digits than its factorization.

129418042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292833.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 129418042 is about 11376.2050790235. The cubic root of 129418042 is about 505.8226528840.

The spelling of 129418042 in words is "one hundred twenty-nine million, four hundred eighteen thousand, forty-two".