321387 has 8 divisors (see below), whose sum is σ = 467520. Its totient is φ = 194760.

The previous prime is 321383. The next prime is 321397. The reversal of 321387 is 783123.

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

It is not a de Polignac number, because 321387 - 2² = 321383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (321383) 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, 4837 + ... + 4902.

It is an arithmetic number, because the mean of its divisors is an integer number (58440).

2³²¹³⁸⁷ is an apocalyptic number.

321387 is a deficient number, since it is larger than the sum of its proper divisors (146133).

321387 is a wasteful number, since it uses less digits than its factorization.

321387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9753.

The product of its digits is 1008, while the sum is 24.

The square root of 321387 is about 566.9100457745. The cubic root of 321387 is about 68.4977177921.

The spelling of 321387 in words is "three hundred twenty-one thousand, three hundred eighty-seven".