42240866 has 16 divisors (see below), whose sum is σ = 64491000. Its totient is φ = 20746368.

The previous prime is 42240859. The next prime is 42240871. The reversal of 42240866 is 66804224.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 40589641 + 1651225 = 6371^2 + 1285^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50540 + ... + 51368.

Almost surely, 2^42240866 is an apocalyptic number.

42240866 is a deficient number, since it is larger than the sum of its proper divisors (22250134).

42240866 is a wasteful number, since it uses less digits than its factorization.

42240866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253.

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 42240866 is about 6499.2973466368. The cubic root of 42240866 is about 348.2658876512.

The spelling of 42240866 in words is "forty-two million, two hundred forty thousand, eight hundred sixty-six".