2161473 has 4 divisors (see below), whose sum is σ = 2881968. Its totient is φ = 1440980.

The previous prime is 2161469. The next prime is 2161493. The reversal of 2161473 is 3741612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2161473 - 2² = 2161469 is a prime.

It is an Ulam number.

It is a D-number.

2161473 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2161433) 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, 360243 + ... + 360248.

It is an arithmetic number, because the mean of its divisors is an integer number (720492).

2^2161473 is an apocalyptic number.

It is an amenable number.

2161473 is a deficient number, since it is larger than the sum of its proper divisors (720495).

2161473 is an equidigital number, since it uses as much as digits as its factorization.

2161473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720494.

The product of its digits is 1008, while the sum is 24.

The square root of 2161473 is about 1470.1948850408. The cubic root of 2161473 is about 129.2954588204.

The spelling of 2161473 in words is "two million, one hundred sixty-one thousand, four hundred seventy-three".