40001449 has 2 divisors, whose sum is σ = 40001450. Its totient is φ = 40001448.

The previous prime is 40001447. The next prime is 40001453. The reversal of 40001449 is 94410004.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39942400 + 59049 = 6320^2 + 243^2 .

It is a cyclic number.

It is not a de Polignac number, because 40001449 - 2¹ = 40001447 is a prime.

Together with 40001447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40001443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20000724 + 20000725.

It is an arithmetic number, because the mean of its divisors is an integer number (20000725).

Almost surely, 2^40001449 is an apocalyptic number.

It is an amenable number.

40001449 is a deficient number, since it is larger than the sum of its proper divisors (1).

40001449 is an equidigital number, since it uses as much as digits as its factorization.

40001449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 40001449 is about 6324.6698728076. The cubic root of 40001449 is about 341.9993188774. Note that the first 3 decimals are identical.

The spelling of 40001449 in words is "forty million, one thousand, four hundred forty-nine".