402043321 has 8 divisors (see below), whose sum is σ = 403968960. Its totient is φ = 400123152.

The previous prime is 402043307. The next prime is 402043333. The reversal of 402043321 is 123340204.

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

It is a cyclic number.

It is not a de Polignac number, because 402043321 - 2²³ = 393654713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402043391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224596 + ... + 226378.

It is an arithmetic number, because the mean of its divisors is an integer number (50496120).

Almost surely, 2^402043321 is an apocalyptic number.

It is an amenable number.

402043321 is a deficient number, since it is larger than the sum of its proper divisors (1925639).

402043321 is a wasteful number, since it uses less digits than its factorization.

402043321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2735.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 402043321 is about 20051.0179542087. The cubic root of 402043321 is about 738.0587792824.

Adding to 402043321 its reverse (123340204), we get a palindrome (525383525).

The spelling of 402043321 in words is "four hundred two million, forty-three thousand, three hundred twenty-one".