42499643 has 8 divisors (see below), whose sum is σ = 46216512. Its totient is φ = 38918016.

The previous prime is 42499631. The next prime is 42499687. The reversal of 42499643 is 34699424.

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

It is a cyclic number.

It is not a de Polignac number, because 42499643 - 2²⁴ = 25722427 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42499643.

It is not an unprimeable number, because it can be changed into a prime (42499043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33155 + ... + 34412.

It is an arithmetic number, because the mean of its divisors is an integer number (5777064).

Almost surely, 2^42499643 is an apocalyptic number.

42499643 is a deficient number, since it is larger than the sum of its proper divisors (3716869).

42499643 is a wasteful number, since it uses less digits than its factorization.

42499643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67621.

The product of its digits is 186624, while the sum is 41.

The square root of 42499643 is about 6519.1750244950. The cubic root of 42499643 is about 348.9756252082.

The spelling of 42499643 in words is "forty-two million, four hundred ninety-nine thousand, six hundred forty-three".