2165461 has 2 divisors, whose sum is σ = 2165462. Its totient is φ = 2165460.

The previous prime is 2165453. The next prime is 2165467. The reversal of 2165461 is 1645612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1102500 + 1062961 = 1050^2 + 1031^2 .

It is a cyclic number.

It is not a de Polignac number, because 2165461 - 2³ = 2165453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2165467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082730 + 1082731.

It is an arithmetic number, because the mean of its divisors is an integer number (1082731).

2^2165461 is an apocalyptic number.

It is an amenable number.

2165461 is a deficient number, since it is larger than the sum of its proper divisors (1).

2165461 is an equidigital number, since it uses as much as digits as its factorization.

2165461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 25.

The square root of 2165461 is about 1471.5505427949. The cubic root of 2165461 is about 129.3749283141.

The spelling of 2165461 in words is "two million, one hundred sixty-five thousand, four hundred sixty-one".