3087221 has 4 divisors (see below), whose sum is σ = 3221472. Its totient is φ = 2952972.

The previous prime is 3087211. The next prime is 3087223. The reversal of 3087221 is 1227803.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1227803 = 71 ⋅17293.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3087221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 134227 = 3087221 / (3 + 0 + 8 + 7 + 2 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3087223) 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, 67091 + ... + 67136.

It is an arithmetic number, because the mean of its divisors is an integer number (805368).

Almost surely, 2^3087221 is an apocalyptic number.

It is an amenable number.

3087221 is a deficient number, since it is larger than the sum of its proper divisors (134251).

3087221 is a wasteful number, since it uses less digits than its factorization.

3087221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134250.

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

The square root of 3087221 is about 1757.0489463871. The cubic root of 3087221 is about 145.6093421983.

The spelling of 3087221 in words is "three million, eighty-seven thousand, two hundred twenty-one".