42126166 has 4 divisors (see below), whose sum is σ = 63189252. Its totient is φ = 21063082.

The previous prime is 42126163. The next prime is 42126169. The reversal of 42126166 is 66162124.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (42126163) and next prime (42126169).

It is a super-2 number, since 2×42126166² = 3549227723719112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42126163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10531540 + ... + 10531543.

It is an arithmetic number, because the mean of its divisors is an integer number (15797313).

Almost surely, 2^42126166 is an apocalyptic number.

42126166 is a deficient number, since it is larger than the sum of its proper divisors (21063086).

42126166 is a wasteful number, since it uses less digits than its factorization.

42126166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21063085.

The product of its digits is 3456, while the sum is 28.

The square root of 42126166 is about 6490.4673175358. The cubic root of 42126166 is about 347.9503771671.

The spelling of 42126166 in words is "forty-two million, one hundred twenty-six thousand, one hundred sixty-six".