42494639 has 16 divisors (see below), whose sum is σ = 48881664. Its totient is φ = 36564000.

The previous prime is 42494629. The next prime is 42494701. The reversal of 42494639 is 93649424.

42494639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42494639 - 2⁴ = 42494623 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42494596 and 42494605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42494609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24722 + ... + 26384.

It is an arithmetic number, because the mean of its divisors is an integer number (3055104).

Almost surely, 2^42494639 is an apocalyptic number.

42494639 is a deficient number, since it is larger than the sum of its proper divisors (6387025).

42494639 is a wasteful number, since it uses less digits than its factorization.

42494639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798.

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

The square root of 42494639 is about 6518.7912223049. The cubic root of 42494639 is about 348.9619282887.

It can be divided in two parts, 4249 and 4639, that added together give a palindrome (8888).

The spelling of 42494639 in words is "forty-two million, four hundred ninety-four thousand, six hundred thirty-nine".