2156606 has 8 divisors (see below), whose sum is σ = 3243240. Its totient is φ = 1075528.

The previous prime is 2156599. The next prime is 2156617. The reversal of 2156606 is 6066512.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 221 + ... + 2088.

It is an arithmetic number, because the mean of its divisors is an integer number (405405).

2^2156606 is an apocalyptic number.

2156606 is a deficient number, since it is larger than the sum of its proper divisors (1086634).

2156606 is a wasteful number, since it uses less digits than its factorization.

2156606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2778.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 2156606 is about 1468.5387294859. The cubic root of 2156606 is about 129.1983408043.

It can be divided in two parts, 2156 and 606, that multiplied together give a triangular number (1306536 = T₁₆₁₆).

The spelling of 2156606 in words is "two million, one hundred fifty-six thousand, six hundred six".