2166242 has 32 divisors (see below), whose sum is σ = 3855600. Its totient is φ = 908544.

The previous prime is 2166233. The next prime is 2166251. The reversal of 2166242 is 2426612.

2166242 = T₆₈ + T₆₉ + ... + T₂₃₆.

It is an interprime number because it is at equal distance from previous prime (2166233) and next prime (2166251).

It can be written as a sum of positive squares in 8 ways, for example, as 2401 + 2163841 = 49^2 + 1471^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74684 + ... + 74712.

2^2166242 is an apocalyptic number.

2166242 is a deficient number, since it is larger than the sum of its proper divisors (1689358).

2166242 is a wasteful number, since it uses less digits than its factorization.

2166242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87 (or 61 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 2166242 is about 1471.8158852248. The cubic root of 2166242 is about 129.3904799948.

The spelling of 2166242 in words is "two million, one hundred sixty-six thousand, two hundred forty-two".