2156041 has 2 divisors, whose sum is σ = 2156042. Its totient is φ = 2156040.

The previous prime is 2156039. The next prime is 2156053. The reversal of 2156041 is 1406512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1700416 + 455625 = 1304^2 + 675^2 .

It is a cyclic number.

It is not a de Polignac number, because 2156041 - 2¹ = 2156039 is a prime.

Together with 2156039, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2156071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1078020 + 1078021.

It is an arithmetic number, because the mean of its divisors is an integer number (1078021).

2^2156041 is an apocalyptic number.

It is an amenable number.

2156041 is a deficient number, since it is larger than the sum of its proper divisors (1).

2156041 is an equidigital number, since it uses as much as digits as its factorization.

2156041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2156041 is about 1468.3463487883. The cubic root of 2156041 is about 129.1870571116.

The spelling of 2156041 in words is "two million, one hundred fifty-six thousand, forty-one".