2161423 has 6 divisors (see below), whose sum is σ = 2375912. Its totient is φ = 1964820.

The previous prime is 2161417. The next prime is 2161427. The reversal of 2161423 is 3241612.

It is not a de Polignac number, because 2161423 - 2²¹ = 64271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2161423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8811 + ... + 9052.

2^2161423 is an apocalyptic number.

2161423 is a deficient number, since it is larger than the sum of its proper divisors (214489).

2161423 is a wasteful number, since it uses less digits than its factorization.

2161423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17885 (or 17874 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 2161423 is about 1470.1778803941. The cubic root of 2161423 is about 129.2944618424.

The spelling of 2161423 in words is "two million, one hundred sixty-one thousand, four hundred twenty-three".