42841664 has 14 divisors (see below), whose sum is σ = 85014054. Its totient is φ = 21420800.

The previous prime is 42841657. The next prime is 42841691. The reversal of 42841664 is 46614824.

It can be written as a sum of positive squares in only one way, i.e., 35046400 + 7795264 = 5920^2 + 2792^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334637 + ... + 334764.

Almost surely, 2^42841664 is an apocalyptic number.

It is an amenable number.

42841664 is a deficient number, since it is larger than the sum of its proper divisors (42172390).

42841664 is an equidigital number, since it uses as much as digits as its factorization.

42841664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669413 (or 669403 counting only the distinct ones).

The product of its digits is 36864, while the sum is 35.

The square root of 42841664 is about 6545.3543830720. The cubic root of 42841664 is about 349.9092662762.

The spelling of 42841664 in words is "forty-two million, eight hundred forty-one thousand, six hundred sixty-four".