2156085 has 16 divisors (see below), whose sum is σ = 3833280. Its totient is φ = 1149840.

The previous prime is 2156083. The next prime is 2156087. The reversal of 2156085 is 5806512.

2156085 is a `hidden beast` number, since 21 + 560 + 85 = 666.

It is an interprime number because it is at equal distance from previous prime (2156083) and next prime (2156087).

It is not a de Polignac number, because 2156085 - 2¹ = 2156083 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

2156085 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156083) 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, 7851 + ... + 8120.

It is an arithmetic number, because the mean of its divisors is an integer number (239580).

2^2156085 is an apocalyptic number.

It is an amenable number.

2156085 is a deficient number, since it is larger than the sum of its proper divisors (1677195).

2156085 is a wasteful number, since it uses less digits than its factorization.

2156085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15985 (or 15979 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 2156085 is about 1468.3613315530. The cubic root of 2156085 is about 129.1879359125.

The spelling of 2156085 in words is "two million, one hundred fifty-six thousand, eighty-five".