42312578 has 24 divisors (see below), whose sum is σ = 80545104. Its totient is φ = 16485000.

The previous prime is 42312553. The next prime is 42312629. The reversal of 42312578 is 87521324.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18548 + ... + 20703.

It is an arithmetic number, because the mean of its divisors is an integer number (3356046).

Almost surely, 2^42312578 is an apocalyptic number.

42312578 is a deficient number, since it is larger than the sum of its proper divisors (38232526).

42312578 is a wasteful number, since it uses less digits than its factorization.

42312578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39278 (or 39271 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 42312578 is about 6504.8119111931. The cubic root of 42312578 is about 348.4628590189.

It can be divided in two parts, 423125 and 78, that multiplied together give a triangular number (33003750 = T₈₁₂₄).

The spelling of 42312578 in words is "forty-two million, three hundred twelve thousand, five hundred seventy-eight".