402321 has 8 divisors (see below), whose sum is σ = 545760. Its totient is φ = 263552.

The previous prime is 402313. The next prime is 402329. The reversal of 402321 is 123204.

It is an interprime number because it is at equal distance from previous prime (402313) and next prime (402329).

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 402321 - 2³ = 402313 is a prime.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 402297 and 402306.

It is not an unprimeable number, because it can be changed into a prime (402329) 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, 960 + ... + 1313.

It is an arithmetic number, because the mean of its divisors is an integer number (68220).

2⁴⁰²³²¹ is an apocalyptic number.

It is an amenable number.

402321 is a deficient number, since it is larger than the sum of its proper divisors (143439).

402321 is a wasteful number, since it uses less digits than its factorization.

402321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2335.

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

The square root of 402321 is about 634.2877895719. The cubic root of 402321 is about 73.8228658371.

Adding to 402321 its reverse (123204), we get a palindrome (525525).

The spelling of 402321 in words is "four hundred two thousand, three hundred twenty-one", and thus it is an iban number.