42021166 has 16 divisors (see below), whose sum is σ = 68899248. Its totient is φ = 19062400.

The previous prime is 42021143. The next prime is 42021173. The reversal of 42021166 is 66112024.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

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, 11436 + ... + 14656.

It is an arithmetic number, because the mean of its divisors is an integer number (4306203).

Almost surely, 2^42021166 is an apocalyptic number.

42021166 is a deficient number, since it is larger than the sum of its proper divisors (26878082).

42021166 is a wasteful number, since it uses less digits than its factorization.

42021166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3827.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 42021166 is about 6482.3734850747. The cubic root of 42021166 is about 347.6610464126.

The spelling of 42021166 in words is "forty-two million, twenty-one thousand, one hundred sixty-six".