2671621 has 4 divisors (see below), whose sum is σ = 2728512. Its totient is φ = 2614732.

The previous prime is 2671619. The next prime is 2671631. The reversal of 2671621 is 1261762.

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 2671621 - 2¹ = 2671619 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 (2671631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28375 + ... + 28468.

It is an arithmetic number, because the mean of its divisors is an integer number (682128).

2^2671621 is an apocalyptic number.

It is an amenable number.

2671621 is a deficient number, since it is larger than the sum of its proper divisors (56891).

2671621 is an equidigital number, since it uses as much as digits as its factorization.

2671621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56890.

The product of its digits is 1008, while the sum is 25.

The square root of 2671621 is about 1634.5094065193. The cubic root of 2671621 is about 138.7580803129.

The spelling of 2671621 in words is "two million, six hundred seventy-one thousand, six hundred twenty-one".