42129736 has 16 divisors (see below), whose sum is σ = 86174640. Its totient is φ = 19149840.

The previous prime is 42129733. The next prime is 42129739. The reversal of 42129736 is 63792124.

It is an interprime number because it is at equal distance from previous prime (42129733) and next prime (42129739).

It is not an unprimeable number, because it can be changed into a prime (42129733) 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, 239286 + ... + 239461.

It is an arithmetic number, because the mean of its divisors is an integer number (5385915).

Almost surely, 2^42129736 is an apocalyptic number.

It is an amenable number.

42129736 is an abundant number, since it is smaller than the sum of its proper divisors (44044904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42129736 is a wasteful number, since it uses less digits than its factorization.

42129736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478764 (or 478760 counting only the distinct ones).

The product of its digits is 18144, while the sum is 34.

The square root of 42129736 is about 6490.7423304272. The cubic root of 42129736 is about 347.9602059575.

The spelling of 42129736 in words is "forty-two million, one hundred twenty-nine thousand, seven hundred thirty-six".