2821139 has 8 divisors (see below), whose sum is σ = 3050640. Its totient is φ = 2599776.

The previous prime is 2821109. The next prime is 2821141. The reversal of 2821139 is 9311282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2821139 - 2¹² = 2817043 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2821109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1304 + ... + 2709.

It is an arithmetic number, because the mean of its divisors is an integer number (381330).

2^2821139 is an apocalyptic number.

2821139 is a deficient number, since it is larger than the sum of its proper divisors (229501).

2821139 is a wasteful number, since it uses less digits than its factorization.

2821139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4069.

The product of its digits is 864, while the sum is 26.

The square root of 2821139 is about 1679.6246604524. The cubic root of 2821139 is about 141.2997830108.

The spelling of 2821139 in words is "two million, eight hundred twenty-one thousand, one hundred thirty-nine".