2161394 has 8 divisors (see below), whose sum is σ = 3264300. Its totient is φ = 1073296.

The previous prime is 2161373. The next prime is 2161409. The reversal of 2161394 is 4931612.

It can be written as a sum of positive squares in 2 ways, for example, as 2140369 + 21025 = 1463^2 + 145^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3329 + ... + 3924.

2^2161394 is an apocalyptic number.

2161394 is a deficient number, since it is larger than the sum of its proper divisors (1102906).

2161394 is a wasteful number, since it uses less digits than its factorization.

2161394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7404.

The product of its digits is 1296, while the sum is 26.

The square root of 2161394 is about 1470.1680176089. The cubic root of 2161394 is about 129.2938835881.

The spelling of 2161394 in words is "two million, one hundred sixty-one thousand, three hundred ninety-four".