2651281 has 2 divisors, whose sum is σ = 2651282. Its totient is φ = 2651280.

The previous prime is 2651273. The next prime is 2651291. The reversal of 2651281 is 1821562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1476225 + 1175056 = 1215^2 + 1084^2 .

It is a cyclic number.

It is not a de Polignac number, because 2651281 - 2³ = 2651273 is a prime.

It is a super-2 number, since 2×2651281² = 14058581881922, which contains 22 as substring.

2651281 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2651291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1325640 + 1325641.

It is an arithmetic number, because the mean of its divisors is an integer number (1325641).

2^2651281 is an apocalyptic number.

It is an amenable number.

2651281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2651281 is an equidigital number, since it uses as much as digits as its factorization.

2651281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 25.

The square root of 2651281 is about 1628.2754680950. The cubic root of 2651281 is about 138.4050446723.

The spelling of 2651281 in words is "two million, six hundred fifty-one thousand, two hundred eighty-one".