40458281 has 2 divisors, whose sum is σ = 40458282. Its totient is φ = 40458280.

The previous prime is 40458269. The next prime is 40458289. The reversal of 40458281 is 18285404.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40208281 + 250000 = 6341^2 + 500^2 .

It is a cyclic number.

It is not a de Polignac number, because 40458281 - 2¹⁴ = 40441897 is a prime.

It is a super-2 number, since 2×40458281² = 3273745002949922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40458289) 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, 20229140 + 20229141.

It is an arithmetic number, because the mean of its divisors is an integer number (20229141).

Almost surely, 2^40458281 is an apocalyptic number.

It is an amenable number.

40458281 is a deficient number, since it is larger than the sum of its proper divisors (1).

40458281 is an equidigital number, since it uses as much as digits as its factorization.

40458281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 40458281 is about 6360.6824319408. The cubic root of 40458281 is about 343.2963153813.

It can be divided in two parts, 404 and 58281, that added together give a palindrome (58685).

The spelling of 40458281 in words is "forty million, four hundred fifty-eight thousand, two hundred eighty-one".