42715989 has 12 divisors (see below), whose sum is σ = 61762272. Its totient is φ = 28449000.

The previous prime is 42715963. The next prime is 42715993. The reversal of 42715989 is 98951724.

It is not a de Polignac number, because 42715989 - 2¹⁹ = 42191701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42715919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11424 + ... + 14694.

It is an arithmetic number, because the mean of its divisors is an integer number (5146856).

Almost surely, 2^42715989 is an apocalyptic number.

It is an amenable number.

42715989 is a deficient number, since it is larger than the sum of its proper divisors (19046283).

42715989 is a wasteful number, since it uses less digits than its factorization.

42715989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4728 (or 4725 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 42715989 is about 6535.7470116277. The cubic root of 42715989 is about 349.5667810032.

The spelling of 42715989 in words is "forty-two million, seven hundred fifteen thousand, nine hundred eighty-nine".