42021168 has 40 divisors (see below), whose sum is σ = 124063488. Its totient is φ = 12005952.

The previous prime is 42021143. The next prime is 42021173. The reversal of 42021168 is 86112024.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 62196 + ... + 62867.

Almost surely, 2^42021168 is an apocalyptic number.

42021168 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

42021168 is an abundant number, since it is smaller than the sum of its proper divisors (82042320).

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

42021168 is a wasteful number, since it uses less digits than its factorization.

42021168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125081 (or 125075 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 42021168 is about 6482.3736393392. The cubic root of 42021168 is about 347.6610519283.

The spelling of 42021168 in words is "forty-two million, twenty-one thousand, one hundred sixty-eight".