2672821 has 2 divisors, whose sum is σ = 2672822. Its totient is φ = 2672820.

The previous prime is 2672797. The next prime is 2672833. The reversal of 2672821 is 1282762.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1473796 + 1199025 = 1214^2 + 1095^2 .

It is a cyclic number.

It is not a de Polignac number, because 2672821 - 2⁹ = 2672309 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2672821.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2672881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1336410 + 1336411.

It is an arithmetic number, because the mean of its divisors is an integer number (1336411).

2^2672821 is an apocalyptic number.

It is an amenable number.

2672821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2672821 is an equidigital number, since it uses as much as digits as its factorization.

2672821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 28.

The square root of 2672821 is about 1634.8764479312. The cubic root of 2672821 is about 138.7788523177.

The spelling of 2672821 in words is "two million, six hundred seventy-two thousand, eight hundred twenty-one".