2855161 has 2 divisors, whose sum is σ = 2855162. Its totient is φ = 2855160.

The previous prime is 2855159. The next prime is 2855183. The reversal of 2855161 is 1615582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2822400 + 32761 = 1680^2 + 181^2 .

It is a cyclic number.

It is not a de Polignac number, because 2855161 - 2¹ = 2855159 is a prime.

Together with 2855159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2855101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1427580 + 1427581.

It is an arithmetic number, because the mean of its divisors is an integer number (1427581).

2^2855161 is an apocalyptic number.

It is an amenable number.

2855161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2855161 is an equidigital number, since it uses as much as digits as its factorization.

2855161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2400, while the sum is 28.

The square root of 2855161 is about 1689.7221665114. The cubic root of 2855161 is about 141.8655243466.

The spelling of 2855161 in words is "two million, eight hundred fifty-five thousand, one hundred sixty-one".