129842435 has 32 divisors (see below), whose sum is σ = 166129920. Its totient is φ = 97293312.

The previous prime is 129842431. The next prime is 129842441. The reversal of 129842435 is 534248921.

It is a cyclic number.

It is not a de Polignac number, because 129842435 - 2² = 129842431 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129842431) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 947687 + ... + 947823.

It is an arithmetic number, because the mean of its divisors is an integer number (5191560).

Almost surely, 2^129842435 is an apocalyptic number.

129842435 is a deficient number, since it is larger than the sum of its proper divisors (36287485).

129842435 is a wasteful number, since it uses less digits than its factorization.

129842435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335.

The product of its digits is 69120, while the sum is 38.

The square root of 129842435 is about 11394.8424736808. The cubic root of 129842435 is about 506.3749544730.

The spelling of 129842435 in words is "one hundred twenty-nine million, eight hundred forty-two thousand, four hundred thirty-five".