2161442 has 8 divisors (see below), whose sum is σ = 3249516. Its totient is φ = 1078272.

The previous prime is 2161433. The next prime is 2161447. The reversal of 2161442 is 2441612.

It can be written as a sum of positive squares in 2 ways, for example, as 2157961 + 3481 = 1469^2 + 59^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218 + ... + 2090.

2^2161442 is an apocalyptic number.

2161442 is a deficient number, since it is larger than the sum of its proper divisors (1088074).

2161442 is a wasteful number, since it uses less digits than its factorization.

2161442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2452.

The product of its digits is 384, while the sum is 20.

The square root of 2161442 is about 1470.1843421830. The cubic root of 2161442 is about 129.2948406958.

The spelling of 2161442 in words is "two million, one hundred sixty-one thousand, four hundred forty-two".