2321391 has 8 divisors (see below), whose sum is σ = 3106224. Its totient is φ = 1542080.

The previous prime is 2321383. The next prime is 2321393. The reversal of 2321391 is 1931232.

It is a happy number.

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 2321391 - 2³ = 2321383 is a prime.

2321391 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2321393) 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, 270 + ... + 2171.

It is an arithmetic number, because the mean of its divisors is an integer number (388278).

2^2321391 is an apocalyptic number.

2321391 is a deficient number, since it is larger than the sum of its proper divisors (784833).

2321391 is a wasteful number, since it uses less digits than its factorization.

2321391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2761.

The product of its digits is 324, while the sum is 21.

The square root of 2321391 is about 1523.6111708700. The cubic root of 2321391 is about 132.4085710780.

The spelling of 2321391 in words is "two million, three hundred twenty-one thousand, three hundred ninety-one".