2161465 has 16 divisors (see below), whose sum is σ = 2799360. Its totient is φ = 1596160.

The previous prime is 2161447. The next prime is 2161469. The reversal of 2161465 is 5641612.

It is not a de Polignac number, because 2161465 - 2⁵ = 2161433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2161469) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4800 + ... + 5230.

It is an arithmetic number, because the mean of its divisors is an integer number (174960).

2^2161465 is an apocalyptic number.

It is an amenable number.

2161465 is a deficient number, since it is larger than the sum of its proper divisors (637895).

2161465 is a wasteful number, since it uses less digits than its factorization.

2161465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512.

The product of its digits is 1440, while the sum is 25.

The square root of 2161465 is about 1470.1921643105. The cubic root of 2161465 is about 129.2952993049.

It can be divided in two parts, 216 and 1465, that added together give a square (1681 = 41²).

The spelling of 2161465 in words is "two million, one hundred sixty-one thousand, four hundred sixty-five".