42969885 has 16 divisors (see below), whose sum is σ = 78573696. Its totient is φ = 19643328.

The previous prime is 42969881. The next prime is 42969893. The reversal of 42969885 is 58896924.

It is not a de Polignac number, because 42969885 - 2² = 42969881 is a prime.

It is a super-2 number, since 2×42969885² = 3692822033826450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42969881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204514 + ... + 204723.

It is an arithmetic number, because the mean of its divisors is an integer number (4910856).

Almost surely, 2^42969885 is an apocalyptic number.

It is an amenable number.

42969885 is a deficient number, since it is larger than the sum of its proper divisors (35603811).

42969885 is a wasteful number, since it uses less digits than its factorization.

42969885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409252.

The product of its digits is 1244160, while the sum is 51.

The square root of 42969885 is about 6555.1418748949. The cubic root of 42969885 is about 350.2580002462.

The spelling of 42969885 in words is "forty-two million, nine hundred sixty-nine thousand, eight hundred eighty-five".