42166243 has 16 divisors (see below), whose sum is σ = 49061376. Its totient is φ = 35496000.

The previous prime is 42166237. The next prime is 42166253. The reversal of 42166243 is 34266124.

It is a cyclic number.

It is not a de Polignac number, because 42166243 - 2⁵ = 42166211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42166213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167868 + ... + 168118.

It is an arithmetic number, because the mean of its divisors is an integer number (3066336).

Almost surely, 2^42166243 is an apocalyptic number.

42166243 is a deficient number, since it is larger than the sum of its proper divisors (6895133).

42166243 is a wasteful number, since it uses less digits than its factorization.

42166243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594.

The product of its digits is 6912, while the sum is 28.

The square root of 42166243 is about 6493.5539575798. The cubic root of 42166243 is about 348.0606838068.

The spelling of 42166243 in words is "forty-two million, one hundred sixty-six thousand, two hundred forty-three".