42591489 has 16 divisors (see below), whose sum is σ = 59733504. Its totient is φ = 26956800.

The previous prime is 42591487. The next prime is 42591491. The reversal of 42591489 is 98419524.

It is an interprime number because it is at equal distance from previous prime (42591487) and next prime (42591491).

It is not a de Polignac number, because 42591489 - 2¹ = 42591487 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42591489.

It is not an unprimeable number, because it can be changed into a prime (42591487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 609 + ... + 9249.

It is an arithmetic number, because the mean of its divisors is an integer number (3733344).

Almost surely, 2^42591489 is an apocalyptic number.

It is an amenable number.

42591489 is a deficient number, since it is larger than the sum of its proper divisors (17142015).

42591489 is a wasteful number, since it uses less digits than its factorization.

42591489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8728.

The product of its digits is 103680, while the sum is 42.

The square root of 42591489 is about 6526.2155189666. The cubic root of 42591489 is about 349.2268347987.

The spelling of 42591489 in words is "forty-two million, five hundred ninety-one thousand, four hundred eighty-nine".