42129213 has 32 divisors (see below), whose sum is σ = 71562240. Its totient is φ = 21461760.

The previous prime is 42129209. The next prime is 42129229. The reversal of 42129213 is 31292124.

It is not a de Polignac number, because 42129213 - 2² = 42129209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42129233) 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, 3678 + ... + 9888.

It is an arithmetic number, because the mean of its divisors is an integer number (2236320).

Almost surely, 2^42129213 is an apocalyptic number.

It is an amenable number.

42129213 is a deficient number, since it is larger than the sum of its proper divisors (29433027).

42129213 is a wasteful number, since it uses less digits than its factorization.

42129213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6257.

The product of its digits is 864, while the sum is 24.

The square root of 42129213 is about 6490.7020421523. The cubic root of 42129213 is about 347.9587660882.

The spelling of 42129213 in words is "forty-two million, one hundred twenty-nine thousand, two hundred thirteen".