42170074 has 4 divisors (see below), whose sum is σ = 63255114. Its totient is φ = 21085036.

The previous prime is 42170053. The next prime is 42170077. The reversal of 42170074 is 47007124.

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., 42159049 + 11025 = 6493^2 + 105^2 .

It is not an unprimeable number, because it can be changed into a prime (42170077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10542517 + ... + 10542520.

Almost surely, 2^42170074 is an apocalyptic number.

42170074 is a deficient number, since it is larger than the sum of its proper divisors (21085040).

42170074 is a wasteful number, since it uses less digits than its factorization.

42170074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21085039.

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 42170074 is about 6493.8489357237. The cubic root of 42170074 is about 348.0712244669.

Adding to 42170074 its reverse (47007124), we get a palindrome (89177198).

The spelling of 42170074 in words is "forty-two million, one hundred seventy thousand, seventy-four".