42042458 has 4 divisors (see below), whose sum is σ = 63063690. Its totient is φ = 21021228.

The previous prime is 42042439. The next prime is 42042491. The reversal of 42042458 is 85424024.

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., 24039409 + 18003049 = 4903^2 + 4243^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42042458.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510613 + ... + 10510616.

Almost surely, 2^42042458 is an apocalyptic number.

42042458 is a deficient number, since it is larger than the sum of its proper divisors (21021232).

42042458 is a wasteful number, since it uses less digits than its factorization.

42042458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21021231.

The product of its (nonzero) digits is 10240, while the sum is 29.

The square root of 42042458 is about 6484.0155767857. The cubic root of 42042458 is about 347.7197561043.

The spelling of 42042458 in words is "forty-two million, forty-two thousand, four hundred fifty-eight".