42491242 has 8 divisors (see below), whose sum is σ = 63767232. Its totient is φ = 21235500.

The previous prime is 42491233. The next prime is 42491261. The reversal of 42491242 is 24219424.

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

It is a self number, because there is not a number n which added to its sum of digits gives 42491242.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2367 + ... + 9517.

It is an arithmetic number, because the mean of its divisors is an integer number (7970904).

Almost surely, 2^42491242 is an apocalyptic number.

42491242 is a deficient number, since it is larger than the sum of its proper divisors (21275990).

42491242 is a wasteful number, since it uses less digits than its factorization.

42491242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10124.

The product of its digits is 4608, while the sum is 28.

The square root of 42491242 is about 6518.5306626570. The cubic root of 42491242 is about 348.9526294274.

The spelling of 42491242 in words is "forty-two million, four hundred ninety-one thousand, two hundred forty-two".