42745889 has 8 divisors (see below), whose sum is σ = 43797888. Its totient is φ = 41699920.

The previous prime is 42745883. The next prime is 42745897. The reversal of 42745889 is 98854724.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42745889 is a prime.

It is a super-2 number, since 2×42745889² = 3654422052800642, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42745883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14999 + ... + 17619.

It is an arithmetic number, because the mean of its divisors is an integer number (5474736).

Almost surely, 2^42745889 is an apocalyptic number.

It is an amenable number.

42745889 is a deficient number, since it is larger than the sum of its proper divisors (1051999).

42745889 is a wasteful number, since it uses less digits than its factorization.

42745889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3015.

The product of its digits is 645120, while the sum is 47.

The square root of 42745889 is about 6538.0340317254. The cubic root of 42745889 is about 349.6483243100.

It can be divided in two parts, 42745 and 889, that added together give a palindrome (43634).

The spelling of 42745889 in words is "forty-two million, seven hundred forty-five thousand, eight hundred eighty-nine".