2112604465 has 4 divisors (see below), whose sum is σ = 2535125364. Its totient is φ = 1690083568.

The previous prime is 2112604453. The next prime is 2112604477. The reversal of 2112604465 is 5644062112.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (2112604453) and next prime (2112604477).

It can be written as a sum of positive squares in 2 ways, for example, as 1231167744 + 881436721 = 35088^2 + 29689^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112604465 - 2⁹ = 2112603953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211260442 + ... + 211260451.

It is an arithmetic number, because the mean of its divisors is an integer number (633781341).

Almost surely, 2^2112604465 is an apocalyptic number.

It is an amenable number.

2112604465 is a deficient number, since it is larger than the sum of its proper divisors (422520899).

2112604465 is an equidigital number, since it uses as much as digits as its factorization.

2112604465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422520898.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 2112604465 is about 45963.0771924596. The cubic root of 2112604465 is about 1283.1361219794.

Adding to 2112604465 its reverse (5644062112), we get a palindrome (7756666577).

The spelling of 2112604465 in words is "two billion, one hundred twelve million, six hundred four thousand, four hundred sixty-five".