42256660 has 12 divisors (see below), whose sum is σ = 88739028. Its totient is φ = 16902656.

The previous prime is 42256657. The next prime is 42256661. The reversal of 42256660 is 6665224.

It can be written as a sum of positive squares in 2 ways, for example, as 30669444 + 11587216 = 5538^2 + 3404^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42256661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056397 + ... + 1056436.

It is an arithmetic number, because the mean of its divisors is an integer number (7394919).

Almost surely, 2^42256660 is an apocalyptic number.

It is an amenable number.

42256660 is an abundant number, since it is smaller than the sum of its proper divisors (46482368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42256660 is a wasteful number, since it uses less digits than its factorization.

42256660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112842 (or 2112840 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 42256660 is about 6500.5122875047. The cubic root of 42256660 is about 348.3092881662.

The spelling of 42256660 in words is "forty-two million, two hundred fifty-six thousand, six hundred sixty".