2321281 has 2 divisors, whose sum is σ = 2321282. Its totient is φ = 2321280.

The previous prime is 2321273. The next prime is 2321309. The reversal of 2321281 is 1821232.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2202256 + 119025 = 1484^2 + 345^2 .

It is a cyclic number.

It is not a de Polignac number, because 2321281 - 2³ = 2321273 is a prime.

It is a super-2 number, since 2×2321281² = 10776690961922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2321381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1160640 + 1160641.

It is an arithmetic number, because the mean of its divisors is an integer number (1160641).

2^2321281 is an apocalyptic number.

It is an amenable number.

2321281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2321281 is an equidigital number, since it uses as much as digits as its factorization.

2321281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 19.

The square root of 2321281 is about 1523.5750719935. The cubic root of 2321281 is about 132.4064796347.

The spelling of 2321281 in words is "two million, three hundred twenty-one thousand, two hundred eighty-one".