40865449 has 2 divisors, whose sum is σ = 40865450. Its totient is φ = 40865448.

The previous prime is 40865443. The next prime is 40865459. The reversal of 40865449 is 94456804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39501225 + 1364224 = 6285^2 + 1168^2 .

It is a cyclic number.

It is not a de Polignac number, because 40865449 - 2³ = 40865441 is a prime.

It is not a weakly prime, because it can be changed into another prime (40865441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20432724 + 20432725.

It is an arithmetic number, because the mean of its divisors is an integer number (20432725).

Almost surely, 2^40865449 is an apocalyptic number.

It is an amenable number.

40865449 is a deficient number, since it is larger than the sum of its proper divisors (1).

40865449 is an equidigital number, since it uses as much as digits as its factorization.

40865449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 40865449 is about 6392.6089353252. The cubic root of 40865449 is about 344.4441065284. Note that the first 3 decimals are identical.

It can be divided in two parts, 40865 and 449, that added together give a palindrome (41314).

The spelling of 40865449 in words is "forty million, eight hundred sixty-five thousand, four hundred forty-nine".