42501664 has 24 divisors (see below), whose sum is σ = 84058128. Its totient is φ = 21153600.

The previous prime is 42501661. The next prime is 42501671. The reversal of 42501664 is 46610524.

It is not an unprimeable number, because it can be changed into a prime (42501661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4339 + ... + 10189.

It is an arithmetic number, because the mean of its divisors is an integer number (3502422).

Almost surely, 2^42501664 is an apocalyptic number.

It is an amenable number.

42501664 is a deficient number, since it is larger than the sum of its proper divisors (41556464).

42501664 is a wasteful number, since it uses less digits than its factorization.

42501664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6088 (or 6080 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 42501664 is about 6519.3300269276. The cubic root of 42501664 is about 348.9811567728.

The spelling of 42501664 in words is "forty-two million, five hundred one thousand, six hundred sixty-four".