402421323 has 8 divisors (see below), whose sum is σ = 553870336. Its totient is φ = 259626600.

The previous prime is 402421321. The next prime is 402421337. The reversal of 402421323 is 323124204.

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

It is not a de Polignac number, because 402421323 - 2¹ = 402421321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402421323.

It is not an unprimeable number, because it can be changed into a prime (402421321) 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, 2163463 + ... + 2163648.

It is an arithmetic number, because the mean of its divisors is an integer number (69233792).

Almost surely, 2^402421323 is an apocalyptic number.

402421323 is a deficient number, since it is larger than the sum of its proper divisors (151449013).

402421323 is a wasteful number, since it uses less digits than its factorization.

402421323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4327145.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 402421323 is about 20060.4417448869. The cubic root of 402421323 is about 738.2900149816.

Adding to 402421323 its reverse (323124204), we get a palindrome (725545527).

The spelling of 402421323 in words is "four hundred two million, four hundred twenty-one thousand, three hundred twenty-three".