42558994 has 4 divisors (see below), whose sum is σ = 63838494. Its totient is φ = 21279496.

The previous prime is 42558983. The next prime is 42559021. The reversal of 42558994 is 49985524.

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., 39879225 + 2679769 = 6315^2 + 1637^2 .

It is a super-2 number, since 2×42558994² = 3622535940584072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10639747 + ... + 10639750.

Almost surely, 2^42558994 is an apocalyptic number.

42558994 is a deficient number, since it is larger than the sum of its proper divisors (21279500).

42558994 is a wasteful number, since it uses less digits than its factorization.

42558994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21279499.

The product of its digits is 518400, while the sum is 46.

The square root of 42558994 is about 6523.7254693925. The cubic root of 42558994 is about 349.1379984804.

It can be divided in two parts, 4255899 and 4, that added together give a triangular number (4255903 = T₂₉₁₇).

The spelling of 42558994 in words is "forty-two million, five hundred fifty-eight thousand, nine hundred ninety-four".