2120465 has 4 divisors (see below), whose sum is σ = 2544564. Its totient is φ = 1696368.

The previous prime is 2120453. The next prime is 2120473. The reversal of 2120465 is 5640212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 795664 + 1324801 = 892^2 + 1151^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120465 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212042 + ... + 212051.

It is an arithmetic number, because the mean of its divisors is an integer number (636141).

2^2120465 is an apocalyptic number.

It is an amenable number.

2120465 is a deficient number, since it is larger than the sum of its proper divisors (424099).

2120465 is an equidigital number, since it uses as much as digits as its factorization.

2120465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424098.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2120465 is about 1456.1816507565. The cubic root of 2120465 is about 128.4725574387.

Adding to 2120465 its reverse (5640212), we get a palindrome (7760677).

The spelling of 2120465 in words is "two million, one hundred twenty thousand, four hundred sixty-five".