2272861 has 2 divisors, whose sum is σ = 2272862. Its totient is φ = 2272860.

The previous prime is 2272859. The next prime is 2272903. The reversal of 2272861 is 1682722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1452025 + 820836 = 1205^2 + 906^2 .

It is a cyclic number.

It is not a de Polignac number, because 2272861 - 2¹ = 2272859 is a prime.

Together with 2272859, it forms a pair of twin primes.

2272861 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2272811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1136430 + 1136431.

It is an arithmetic number, because the mean of its divisors is an integer number (1136431).

2^2272861 is an apocalyptic number.

It is an amenable number.

2272861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2272861 is an equidigital number, since it uses as much as digits as its factorization.

2272861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 28.

The square root of 2272861 is about 1507.6010745552. The cubic root of 2272861 is about 131.4793733641.

The spelling of 2272861 in words is "two million, two hundred seventy-two thousand, eight hundred sixty-one".