42166443 has 24 divisors (see below), whose sum is σ = 65442384. Its totient is φ = 24048640.

The previous prime is 42166427. The next prime is 42166459. The reversal of 42166443 is 34466124.

It is an interprime number because it is at equal distance from previous prime (42166427) and next prime (42166459).

It is not a de Polignac number, because 42166443 - 2⁴ = 42166427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42166443.

It is not an unprimeable number, because it can be changed into a prime (42166483) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2755 + ... + 9587.

It is an arithmetic number, because the mean of its divisors is an integer number (2726766).

Almost surely, 2^42166443 is an apocalyptic number.

42166443 is a deficient number, since it is larger than the sum of its proper divisors (23275941).

42166443 is a wasteful number, since it uses less digits than its factorization.

42166443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6875 (or 6864 counting only the distinct ones).

The product of its digits is 13824, while the sum is 30.

The square root of 42166443 is about 6493.5693574490. The cubic root of 42166443 is about 348.0612341050.

The spelling of 42166443 in words is "forty-two million, one hundred sixty-six thousand, four hundred forty-three".