42559690 has 12 divisors (see below), whose sum is σ = 76644594. Its totient is φ = 17015624.

The previous prime is 42559669. The next prime is 42559691. The reversal of 42559690 is 9695524.

It can be written as a sum of positive squares in only one way, i.e., 38303721 + 4255969 = 6189^2 + 2063^2 .

It is a super-2 number, since 2×42559690² = 3622654425792200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42559691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19599 + ... + 21661.

Almost surely, 2^42559690 is an apocalyptic number.

42559690 is a deficient number, since it is larger than the sum of its proper divisors (34084904).

42559690 is an frugal number, since it uses more digits than its factorization.

42559690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4133 (or 2070 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 42559690 is about 6523.7788129274. The cubic root of 42559690 is about 349.1399017109.

Multiplying 42559690 by its sum of digits (40), we get a square (1702387600 = 41260²).

The spelling of 42559690 in words is "forty-two million, five hundred fifty-nine thousand, six hundred ninety".