42129165 has 24 divisors (see below), whose sum is σ = 72995040. Its totient is φ = 20739264.

The previous prime is 42129149. The next prime is 42129167. The reversal of 42129165 is 56192124.

It is not a de Polignac number, because 42129165 - 2⁴ = 42129149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42129167) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5775 + ... + 10844.

It is an arithmetic number, because the mean of its divisors is an integer number (3041460).

Almost surely, 2^42129165 is an apocalyptic number.

It is an amenable number.

42129165 is a deficient number, since it is larger than the sum of its proper divisors (30865875).

42129165 is a wasteful number, since it uses less digits than its factorization.

42129165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16653 (or 16640 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

The square root of 42129165 is about 6490.6983445543. The cubic root of 42129165 is about 347.9586339390.

The spelling of 42129165 in words is "forty-two million, one hundred twenty-nine thousand, one hundred sixty-five".