2821394 has 4 divisors (see below), whose sum is σ = 4232094. Its totient is φ = 1410696.

The previous prime is 2821393. The next prime is 2821411. The reversal of 2821394 is 4931282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4931282 = 2 ⋅2465641.

It can be written as a sum of positive squares in only one way, i.e., 2739025 + 82369 = 1655^2 + 287^2 .

It is not an unprimeable number, because it can be changed into a prime (2821393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 705347 + ... + 705350.

2^2821394 is an apocalyptic number.

2821394 is a deficient number, since it is larger than the sum of its proper divisors (1410700).

2821394 is a wasteful number, since it uses less digits than its factorization.

2821394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410699.

The product of its digits is 3456, while the sum is 29.

The square root of 2821394 is about 1679.7005685538. The cubic root of 2821394 is about 141.3040401990.

The spelling of 2821394 in words is "two million, eight hundred twenty-one thousand, three hundred ninety-four".