42244591 has 4 divisors (see below), whose sum is σ = 42260184. Its totient is φ = 42229000.

The previous prime is 42244549. The next prime is 42244597. The reversal of 42244591 is 19544224.

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

It is a cyclic number.

It is not a de Polignac number, because 42244591 - 2¹³ = 42236399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42244597) 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, 2560 + ... + 9541.

It is an arithmetic number, because the mean of its divisors is an integer number (10565046).

Almost surely, 2^42244591 is an apocalyptic number.

42244591 is a deficient number, since it is larger than the sum of its proper divisors (15593).

42244591 is a wasteful number, since it uses less digits than its factorization.

42244591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15592.

The product of its digits is 11520, while the sum is 31.

The square root of 42244591 is about 6499.5839097591. The cubic root of 42244591 is about 348.2761245964.

The spelling of 42244591 in words is "forty-two million, two hundred forty-four thousand, five hundred ninety-one".