3112645 has 4 divisors (see below), whose sum is σ = 3735180. Its totient is φ = 2490112.

The previous prime is 3112639. The next prime is 3112661. The reversal of 3112645 is 5462113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5462113 = 821 ⋅6653.

It can be written as a sum of positive squares in 2 ways, for example, as 1965604 + 1147041 = 1402^2 + 1071^2 .

It is a cyclic number.

It is not a de Polignac number, because 3112645 - 2¹⁹ = 2588357 is a prime.

3112645 is a lucky number.

It is a congruent 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, 311260 + ... + 311269.

It is an arithmetic number, because the mean of its divisors is an integer number (933795).

Almost surely, 2^3112645 is an apocalyptic number.

It is an amenable number.

3112645 is a deficient number, since it is larger than the sum of its proper divisors (622535).

3112645 is an equidigital number, since it uses as much as digits as its factorization.

3112645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622534.

The product of its digits is 720, while the sum is 22.

The square root of 3112645 is about 1764.2689704237. The cubic root of 3112645 is about 146.0079591583.

Adding to 3112645 its reverse (5462113), we get a palindrome (8574758).

The spelling of 3112645 in words is "three million, one hundred twelve thousand, six hundred forty-five".