2143394 has 24 divisors (see below), whose sum is σ = 3749004. Its totient is φ = 915200.

The previous prime is 2143391. The next prime is 2143417. The reversal of 2143394 is 4933412.

It can be written as a sum of positive squares in 2 ways, for example, as 2140369 + 3025 = 1463^2 + 55^2 .

It is a d-powerful number, because it can be written as 2⁹ + 1 + 4 + 3¹² + 3¹³ + 9³ + 4⁷ .

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (2143391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3854 + ... + 4374.

2^2143394 is an apocalyptic number.

2143394 is a deficient number, since it is larger than the sum of its proper divisors (1605610).

2143394 is a wasteful number, since it uses less digits than its factorization.

2143394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562 (or 551 counting only the distinct ones).

The product of its digits is 2592, while the sum is 26.

The square root of 2143394 is about 1464.0334695628. The cubic root of 2143394 is about 128.9339645595.

The spelling of 2143394 in words is "two million, one hundred forty-three thousand, three hundred ninety-four".