2321287 has 4 divisors (see below), whose sum is σ = 2443480. Its totient is φ = 2199096.

The previous prime is 2321281. The next prime is 2321309. The reversal of 2321287 is 7821232.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2321287 - 2⁷ = 2321159 is a prime.

It is a Duffinian number.

2321287 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2321281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61068 + ... + 61105.

It is an arithmetic number, because the mean of its divisors is an integer number (610870).

2^2321287 is an apocalyptic number.

2321287 is a deficient number, since it is larger than the sum of its proper divisors (122193).

2321287 is a wasteful number, since it uses less digits than its factorization.

2321287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122192.

The product of its digits is 1344, while the sum is 25.

The square root of 2321287 is about 1523.5770410452. The cubic root of 2321287 is about 132.4065937151.

Subtracting 2321287 from its reverse (7821232), we obtain a palindrome (5499945).

The spelling of 2321287 in words is "two million, three hundred twenty-one thousand, two hundred eighty-seven".