1518281 has 2 divisors, whose sum is σ = 1518282. Its totient is φ = 1518280.

The previous prime is 1518277. The next prime is 1518311. The reversal of 1518281 is 1828151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1177225 + 341056 = 1085^2 + 584^2 .

It is a cyclic number.

It is not a de Polignac number, because 1518281 - 2² = 1518277 is a prime.

It is a super-2 number, since 2×1518281² = 4610354389922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1518281.

It is not a weakly prime, because it can be changed into another prime (1518481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 759140 + 759141.

It is an arithmetic number, because the mean of its divisors is an integer number (759141).

2^1518281 is an apocalyptic number.

It is an amenable number.

1518281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1518281 is an equidigital number, since it uses as much as digits as its factorization.

1518281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 640, while the sum is 26.

The square root of 1518281 is about 1232.1854568205. The cubic root of 1518281 is about 114.9345815710.

The spelling of 1518281 in words is "one million, five hundred eighteen thousand, two hundred eighty-one".