2156598 has 16 divisors (see below), whose sum is σ = 4792560. Its totient is φ = 718848.

The previous prime is 2156597. The next prime is 2156599. The reversal of 2156598 is 8956512.

It is a happy number.

2156598 is a `hidden beast` number, since 2 + 1 + 565 + 98 = 666.

It is an interprime number because it is at equal distance from previous prime (2156597) and next prime (2156599).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156597) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19915 + ... + 20022.

It is an arithmetic number, because the mean of its divisors is an integer number (299535).

2^2156598 is an apocalyptic number.

2156598 is an abundant number, since it is smaller than the sum of its proper divisors (2635962).

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

2156598 is a wasteful number, since it uses less digits than its factorization.

2156598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39948 (or 39942 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 2156598 is about 1468.5360056873. The cubic root of 2156598 is about 129.1981810490.

The spelling of 2156598 in words is "two million, one hundred fifty-six thousand, five hundred ninety-eight".