42581499 has 8 divisors (see below), whose sum is σ = 57337872. Its totient is φ = 28106400.

The previous prime is 42581479. The next prime is 42581501. The reversal of 42581499 is 99418524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42581499 - 2¹⁵ = 42548731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42581499.

It is not an unprimeable number, because it can be changed into a prime (42581479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69964 + ... + 70569.

It is an arithmetic number, because the mean of its divisors is an integer number (7167234).

Almost surely, 2^42581499 is an apocalyptic number.

42581499 is a deficient number, since it is larger than the sum of its proper divisors (14756373).

42581499 is a wasteful number, since it uses less digits than its factorization.

42581499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140637.

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

The square root of 42581499 is about 6525.4500994184. The cubic root of 42581499 is about 349.1995284913.

The spelling of 42581499 in words is "forty-two million, five hundred eighty-one thousand, four hundred ninety-nine".