2161087 has 2 divisors, whose sum is σ = 2161088. Its totient is φ = 2161086.

The previous prime is 2161031. The next prime is 2161121. The reversal of 2161087 is 7801612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2161087 - 2¹⁵ = 2128319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2161007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080543 + 1080544.

It is an arithmetic number, because the mean of its divisors is an integer number (1080544).

2^2161087 is an apocalyptic number.

2161087 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161087 is an equidigital number, since it uses as much as digits as its factorization.

2161087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 2161087 is about 1470.0636040662. The cubic root of 2161087 is about 129.2877617517.

Adding to 2161087 its reverse (7801612), we get a palindrome (9962699).

The spelling of 2161087 in words is "two million, one hundred sixty-one thousand, eighty-seven".