42559493 has 4 divisors (see below), whose sum is σ = 42634860. Its totient is φ = 42484128.

The previous prime is 42559471. The next prime is 42559513. The reversal of 42559493 is 39495524.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3833764 + 38725729 = 1958^2 + 6223^2 .

It is a cyclic number.

It is not a de Polignac number, because 42559493 - 2¹⁸ = 42297349 is a prime.

It is a super-2 number, since 2×42559493² = 3622620888834098, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42559493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42559093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36830 + ... + 37967.

It is an arithmetic number, because the mean of its divisors is an integer number (10658715).

Almost surely, 2^42559493 is an apocalyptic number.

It is an amenable number.

42559493 is a deficient number, since it is larger than the sum of its proper divisors (75367).

42559493 is an equidigital number, since it uses as much as digits as its factorization.

42559493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75366.

The product of its digits is 194400, while the sum is 41.

The square root of 42559493 is about 6523.7637142987. The cubic root of 42559493 is about 349.1393630113.

The spelling of 42559493 in words is "forty-two million, five hundred fifty-nine thousand, four hundred ninety-three".