2087321 has 4 divisors (see below), whose sum is σ = 2197200. Its totient is φ = 1977444.

The previous prime is 2087303. The next prime is 2087339. The reversal of 2087321 is 1237802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2087303) and next prime (2087339).

It is not a de Polignac number, because 2087321 - 2¹⁸ = 1825177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2087381) 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, 54911 + ... + 54948.

It is an arithmetic number, because the mean of its divisors is an integer number (549300).

2^2087321 is an apocalyptic number.

It is an amenable number.

2087321 is a deficient number, since it is larger than the sum of its proper divisors (109879).

2087321 is a wasteful number, since it uses less digits than its factorization.

2087321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109878.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 2087321 is about 1444.7563808477. The cubic root of 2087321 is about 127.7996744383.

The spelling of 2087321 in words is "two million, eighty-seven thousand, three hundred twenty-one".