40001321 has 4 divisors (see below), whose sum is σ = 40210944. Its totient is φ = 39791700.

The previous prime is 40001303. The next prime is 40001359. The reversal of 40001321 is 12310004.

It is a happy number.

40001321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40001321 - 2⁶ = 40001257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40001021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104525 + ... + 104906.

It is an arithmetic number, because the mean of its divisors is an integer number (10052736).

Almost surely, 2^40001321 is an apocalyptic number.

It is an amenable number.

40001321 is a deficient number, since it is larger than the sum of its proper divisors (209623).

40001321 is a wasteful number, since it uses less digits than its factorization.

40001321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209622.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 40001321 is about 6324.6597536943. The cubic root of 40001321 is about 341.9989540909.

Adding to 40001321 its reverse (12310004), we get a palindrome (52311325).

The spelling of 40001321 in words is "forty million, one thousand, three hundred twenty-one".