129655742 has 16 divisors (see below), whose sum is σ = 196327680. Its totient is φ = 64216152.

The previous prime is 129655741. The next prime is 129655759. The reversal of 129655742 is 247556921.

It is a super-2 number, since 2×129655742² = 33621222867141128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129655742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129655741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150509 + ... + 151367.

It is an arithmetic number, because the mean of its divisors is an integer number (12270480).

Almost surely, 2^129655742 is an apocalyptic number.

129655742 is a deficient number, since it is larger than the sum of its proper divisors (66671938).

129655742 is a wasteful number, since it uses less digits than its factorization.

129655742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487.

The product of its digits is 151200, while the sum is 41.

The square root of 129655742 is about 11386.6475312095. The cubic root of 129655742 is about 506.1321422131.

The spelling of 129655742 in words is "one hundred twenty-nine million, six hundred fifty-five thousand, seven hundred forty-two".