2161396 has 6 divisors (see below), whose sum is σ = 3782450. Its totient is φ = 1080696.

The previous prime is 2161373. The next prime is 2161409. The reversal of 2161396 is 6931612.

It can be written as a sum of positive squares in only one way, i.e., 1232100 + 929296 = 1110^2 + 964^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270171 + ... + 270178.

2^2161396 is an apocalyptic number.

It is an amenable number.

2161396 is a deficient number, since it is larger than the sum of its proper divisors (1621054).

2161396 is a wasteful number, since it uses less digits than its factorization.

2161396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540353 (or 540351 counting only the distinct ones).

The product of its digits is 1944, while the sum is 28.

The square root of 2161396 is about 1470.1686978031. The cubic root of 2161396 is about 129.2939234679.

The spelling of 2161396 in words is "two million, one hundred sixty-one thousand, three hundred ninety-six".