2158065 has 96 divisors (see below), whose sum is σ = 5031936. Its totient is φ = 829440.

The previous prime is 2158061. The next prime is 2158069. The reversal of 2158065 is 5608512.

2158065 is a `hidden beast` number, since 21 + 580 + 65 = 666.

It is an interprime number because it is at equal distance from previous prime (2158061) and next prime (2158069).

It is not a de Polignac number, because 2158065 - 2² = 2158061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2158061) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 69600 + ... + 69630.

It is an arithmetic number, because the mean of its divisors is an integer number (52416).

2^2158065 is an apocalyptic number.

It is an amenable number.

2158065 is an abundant number, since it is smaller than the sum of its proper divisors (2873871).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2158065 is a wasteful number, since it uses less digits than its factorization.

2158065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79 (or 76 counting only the distinct ones).

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

The square root of 2158065 is about 1469.0353978036. The cubic root of 2158065 is about 129.2274695815.

The spelling of 2158065 in words is "two million, one hundred fifty-eight thousand, sixty-five".