42170746 has 4 divisors (see below), whose sum is σ = 63256122. Its totient is φ = 21085372.

The previous prime is 42170729. The next prime is 42170759. The reversal of 42170746 is 64707124.

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., 25857225 + 16313521 = 5085^2 + 4039^2 .

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 an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10542685 + ... + 10542688.

Almost surely, 2^42170746 is an apocalyptic number.

42170746 is a deficient number, since it is larger than the sum of its proper divisors (21085376).

42170746 is a wasteful number, since it uses less digits than its factorization.

42170746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21085375.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 42170746 is about 6493.9006767890. The cubic root of 42170746 is about 348.0730733500.

The spelling of 42170746 in words is "forty-two million, one hundred seventy thousand, seven hundred forty-six".