2821379 has 4 divisors (see below), whose sum is σ = 3077880. Its totient is φ = 2564880.

The previous prime is 2821369. The next prime is 2821393. The reversal of 2821379 is 9731282.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2821379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2821319) 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, 128234 + ... + 128255.

It is an arithmetic number, because the mean of its divisors is an integer number (769470).

2^2821379 is an apocalyptic number.

2821379 is a deficient number, since it is larger than the sum of its proper divisors (256501).

2821379 is a wasteful number, since it uses less digits than its factorization.

2821379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256500.

The product of its digits is 6048, while the sum is 32.

The square root of 2821379 is about 1679.6961034663. The cubic root of 2821379 is about 141.3037897832.

Subtracting 2821379 from its reverse (9731282), we obtain a triangular number (6909903 = T₃₇₁₇).

It can be divided in two parts, 282 and 1379, that added together give a palindrome (1661).

The spelling of 2821379 in words is "two million, eight hundred twenty-one thousand, three hundred seventy-nine".