42491882 has 4 divisors (see below), whose sum is σ = 63737826. Its totient is φ = 21245940.

The previous prime is 42491881. The next prime is 42491887. The reversal of 42491882 is 28819424.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 42133081 + 358801 = 6491^2 + 599^2 .

It is not an unprimeable number, because it can be changed into a prime (42491881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10622969 + ... + 10622972.

Almost surely, 2^42491882 is an apocalyptic number.

42491882 is a deficient number, since it is larger than the sum of its proper divisors (21245944).

42491882 is a wasteful number, since it uses less digits than its factorization.

42491882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21245943.

The product of its digits is 36864, while the sum is 38.

The square root of 42491882 is about 6518.5797532898. The cubic root of 42491882 is about 348.9543813850.

The spelling of 42491882 in words is "forty-two million, four hundred ninety-one thousand, eight hundred eighty-two".