2156039 has 2 divisors, whose sum is σ = 2156040. Its totient is φ = 2156038.

The previous prime is 2156023. The next prime is 2156041. The reversal of 2156039 is 9306512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2156039 - 2⁴ = 2156023 is a prime.

It is a Sophie Germain prime.

Together with 2156041, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2155999 and 2156017.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2156009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078019 + 1078020.

It is an arithmetic number, because the mean of its divisors is an integer number (1078020).

2^2156039 is an apocalyptic number.

2156039 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156039 is an equidigital number, since it uses as much as digits as its factorization.

2156039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 2156039 is about 1468.3456677499. The cubic root of 2156039 is about 129.1870171659.

The spelling of 2156039 in words is "two million, one hundred fifty-six thousand, thirty-nine".