2167261 has 2 divisors, whose sum is σ = 2167262. Its totient is φ = 2167260.

The previous prime is 2167259. The next prime is 2167289. The reversal of 2167261 is 1627612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1907161 + 260100 = 1381^2 + 510^2 .

It is a cyclic number.

It is not a de Polignac number, because 2167261 - 2¹ = 2167259 is a prime.

Together with 2167259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2167661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1083630 + 1083631.

It is an arithmetic number, because the mean of its divisors is an integer number (1083631).

2^2167261 is an apocalyptic number.

It is an amenable number.

2167261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2167261 is an equidigital number, since it uses as much as digits as its factorization.

2167261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 25.

The square root of 2167261 is about 1472.1620155404. The cubic root of 2167261 is about 129.4107652370.

The spelling of 2167261 in words is "two million, one hundred sixty-seven thousand, two hundred sixty-one".