39427042 has 4 divisors (see below), whose sum is σ = 59140566. Its totient is φ = 19713520.

The previous prime is 39427019. The next prime is 39427051. The reversal of 39427042 is 24072493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24072493 = 17 ⋅1416029.

It can be written as a sum of positive squares in only one way, i.e., 27029601 + 12397441 = 5199^2 + 3521^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 39426995 and 39427013.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9856759 + ... + 9856762.

Almost surely, 2^39427042 is an apocalyptic number.

39427042 is a deficient number, since it is larger than the sum of its proper divisors (19713524).

39427042 is a wasteful number, since it uses less digits than its factorization.

39427042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19713523.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 39427042 is about 6279.0956355195. The cubic root of 39427042 is about 340.3544228017.

The spelling of 39427042 in words is "thirty-nine million, four hundred twenty-seven thousand, forty-two".