42107566 has 4 divisors (see below), whose sum is σ = 63161352. Its totient is φ = 21053782.

The previous prime is 42107551. The next prime is 42107573. The reversal of 42107566 is 66570124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×42107566² = 3546094228888712, which contains 22 as substring.

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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10526890 + ... + 10526893.

It is an arithmetic number, because the mean of its divisors is an integer number (15790338).

Almost surely, 2^42107566 is an apocalyptic number.

42107566 is a deficient number, since it is larger than the sum of its proper divisors (21053786).

42107566 is a wasteful number, since it uses less digits than its factorization.

42107566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21053785.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 42107566 is about 6489.0342887058. The cubic root of 42107566 is about 347.8991593582.

The spelling of 42107566 in words is "forty-two million, one hundred seven thousand, five hundred sixty-six".