2315945 has 4 divisors (see below), whose sum is σ = 2779140. Its totient is φ = 1852752.

The previous prime is 2315903. The next prime is 2315947. The reversal of 2315945 is 5495132.

2315945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1032256 + 1283689 = 1016^2 + 1133^2 .

It is a cyclic number.

It is not a de Polignac number, because 2315945 - 2⁶ = 2315881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2315947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231590 + ... + 231599.

It is an arithmetic number, because the mean of its divisors is an integer number (694785).

2^2315945 is an apocalyptic number.

It is an amenable number.

2315945 is a deficient number, since it is larger than the sum of its proper divisors (463195).

2315945 is an equidigital number, since it uses as much as digits as its factorization.

2315945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463194.

The product of its digits is 5400, while the sum is 29.

The square root of 2315945 is about 1521.8229200534. The cubic root of 2315945 is about 132.3049461804.

The spelling of 2315945 in words is "two million, three hundred fifteen thousand, nine hundred forty-five".