2821239 has 6 divisors (see below), whose sum is σ = 4075136. Its totient is φ = 1880820.

The previous prime is 2821229. The next prime is 2821267. The reversal of 2821239 is 9321282.

It is a happy number.

It is not a de Polignac number, because 2821239 - 2¹³ = 2813047 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 (2821229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 156727 + ... + 156744.

2^2821239 is an apocalyptic number.

2821239 is a deficient number, since it is larger than the sum of its proper divisors (1253897).

2821239 is a wasteful number, since it uses less digits than its factorization.

2821239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313477 (or 313474 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 2821239 is about 1679.6544287442. The cubic root of 2821239 is about 141.3014525269.

It can be divided in two parts, 282 and 1239, that added together give a square (1521 = 39²).

The spelling of 2821239 in words is "two million, eight hundred twenty-one thousand, two hundred thirty-nine".