2618281 has 2 divisors, whose sum is σ = 2618282. Its totient is φ = 2618280.

The previous prime is 2618279. The next prime is 2618339. The reversal of 2618281 is 1828162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2202256 + 416025 = 1484^2 + 645^2 .

It is a cyclic number.

It is not a de Polignac number, because 2618281 - 2¹ = 2618279 is a prime.

It is a super-2 number, since 2×2618281² = 13710790789922, which contains 22 as substring.

Together with 2618279, it forms a pair of twin primes.

It is a Chen prime.

2618281 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2618261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1309140 + 1309141.

It is an arithmetic number, because the mean of its divisors is an integer number (1309141).

2^2618281 is an apocalyptic number.

It is an amenable number.

2618281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2618281 is an equidigital number, since it uses as much as digits as its factorization.

2618281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536, while the sum is 28.

The square root of 2618281 is about 1618.1103176236. The cubic root of 2618281 is about 137.8284116753.

The spelling of 2618281 in words is "two million, six hundred eighteen thousand, two hundred eighty-one".