2165456 has 20 divisors (see below), whose sum is σ = 4299204. Its totient is φ = 1056000.

The previous prime is 2165453. The next prime is 2165461. The reversal of 2165456 is 6545612.

It can be written as a sum of positive squares in 2 ways, for example, as 250000 + 1915456 = 500^2 + 1384^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 995 + ... + 2306.

2^2165456 is an apocalyptic number.

It is an amenable number.

2165456 is a deficient number, since it is larger than the sum of its proper divisors (2133748).

2165456 is a wasteful number, since it uses less digits than its factorization.

2165456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3350 (or 3344 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 2165456 is about 1471.5488439056. The cubic root of 2165456 is about 129.3748287395.

The spelling of 2165456 in words is "two million, one hundred sixty-five thousand, four hundred fifty-six".