2887621 has 4 divisors (see below), whose sum is σ = 3150144. Its totient is φ = 2625100.

The previous prime is 2887607. The next prime is 2887631. The reversal of 2887621 is 1267882.

2887621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 2887621 - 2¹⁷ = 2756549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2887631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131245 + ... + 131266.

It is an arithmetic number, because the mean of its divisors is an integer number (787536).

2^2887621 is an apocalyptic number.

It is an amenable number.

2887621 is a deficient number, since it is larger than the sum of its proper divisors (262523).

2887621 is a wasteful number, since it uses less digits than its factorization.

2887621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262522.

The product of its digits is 10752, while the sum is 34.

The square root of 2887621 is about 1699.3001500618. The cubic root of 2887621 is about 142.4011174059.

The spelling of 2887621 in words is "two million, eight hundred eighty-seven thousand, six hundred twenty-one".