42115129 has 4 divisors (see below), whose sum is σ = 48131584. Its totient is φ = 36098676.

The previous prime is 42115127. The next prime is 42115133. The reversal of 42115129 is 92151124.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42115129 - 2¹ = 42115127 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42115121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3008217 + ... + 3008230.

It is an arithmetic number, because the mean of its divisors is an integer number (12032896).

Almost surely, 2^42115129 is an apocalyptic number.

It is an amenable number.

42115129 is a deficient number, since it is larger than the sum of its proper divisors (6016455).

42115129 is an equidigital number, since it uses as much as digits as its factorization.

42115129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6016454.

The product of its digits is 720, while the sum is 25.

The square root of 42115129 is about 6489.6170148939. The cubic root of 42115129 is about 347.9199869994.

The spelling of 42115129 in words is "forty-two million, one hundred fifteen thousand, one hundred twenty-nine".