2158966 has 8 divisors (see below), whose sum is σ = 3429000. Its totient is φ = 1015968.

The previous prime is 2158931. The next prime is 2158979. The reversal of 2158966 is 6698512.

2158966 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2158966² = 9322268378312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31716 + ... + 31783.

It is an arithmetic number, because the mean of its divisors is an integer number (428625).

2^2158966 is an apocalyptic number.

2158966 is a deficient number, since it is larger than the sum of its proper divisors (1270034).

2158966 is a wasteful number, since it uses less digits than its factorization.

2158966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63518.

The product of its digits is 25920, while the sum is 37.

The square root of 2158966 is about 1469.3420296173. The cubic root of 2158966 is about 129.2454513924.

The spelling of 2158966 in words is "two million, one hundred fifty-eight thousand, nine hundred sixty-six".