2156873 has 2 divisors, whose sum is σ = 2156874. Its totient is φ = 2156872.

The previous prime is 2156867. The next prime is 2156879. The reversal of 2156873 is 3786512.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (2156867) and next prime (2156879).

It can be written as a sum of positive squares in only one way, i.e., 2155024 + 1849 = 1468^2 + 43^2 .

It is a cyclic number.

It is not a de Polignac number, because 2156873 - 2⁴ = 2156857 is a prime.

It is a super-2 number, since 2×2156873² = 9304202276258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2156879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078436 + 1078437.

It is an arithmetic number, because the mean of its divisors is an integer number (1078437).

2^2156873 is an apocalyptic number.

It is an amenable number.

2156873 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156873 is an equidigital number, since it uses as much as digits as its factorization.

2156873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 32.

The square root of 2156873 is about 1468.6296333657. The cubic root of 2156873 is about 129.2036724124.

The spelling of 2156873 in words is "two million, one hundred fifty-six thousand, eight hundred seventy-three".