3087921 has 4 divisors (see below), whose sum is σ = 4117232. Its totient is φ = 2058612.

The previous prime is 3087907. The next prime is 3087923. The reversal of 3087921 is 1297803.

It is a happy number.

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 not a de Polignac number, because 3087921 - 2⁶ = 3087857 is a prime.

It is a super-2 number, since 2×3087921² = 19070512204482, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3087923) 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, 514651 + ... + 514656.

It is an arithmetic number, because the mean of its divisors is an integer number (1029308).

Almost surely, 2^3087921 is an apocalyptic number.

It is an amenable number.

3087921 is a deficient number, since it is larger than the sum of its proper divisors (1029311).

3087921 is a wasteful number, since it uses less digits than its factorization.

3087921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029310.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 3087921 is about 1757.2481327348. The cubic root of 3087921 is about 145.6203465759.

The spelling of 3087921 in words is "three million, eighty-seven thousand, nine hundred twenty-one".