40002321 has 8 divisors (see below), whose sum is σ = 54067360. Its totient is φ = 26302752.

The previous prime is 40002301. The next prime is 40002329. The reversal of 40002321 is 12320004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40002321 - 2⁶ = 40002257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40002297 and 40002306.

It is not an unprimeable number, because it can be changed into a prime (40002329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91111 + ... + 91548.

It is an arithmetic number, because the mean of its divisors is an integer number (6758420).

Almost surely, 2^40002321 is an apocalyptic number.

It is an amenable number.

40002321 is a deficient number, since it is larger than the sum of its proper divisors (14065039).

40002321 is a wasteful number, since it uses less digits than its factorization.

40002321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182735.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 40002321 is about 6324.7388088363. The cubic root of 40002321 is about 342.0018039644.

Adding to 40002321 its reverse (12320004), we get a palindrome (52322325).

The spelling of 40002321 in words is "forty million, two thousand, three hundred twenty-one".