2161072 has 20 divisors (see below), whose sum is σ = 4323136. Its totient is φ = 1045440.

The previous prime is 2161031. The next prime is 2161087. The reversal of 2161072 is 2701612.

2161072 is an admirable number.

It is an alternating number because its digits alternate between even and odd.

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, 1683 + ... + 2674.

2^2161072 is an apocalyptic number.

It is an amenable number.

2161072 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2161072 is a wasteful number, since it uses less digits than its factorization.

2161072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4396 (or 4390 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 2161072 is about 1470.0585022372. The cubic root of 2161072 is about 129.2874626243.

Adding to 2161072 its reverse (2701612), we get a palindrome (4862684).

The spelling of 2161072 in words is "two million, one hundred sixty-one thousand, seventy-two".