2815965 has 40 divisors (see below), whose sum is σ = 5357880. Its totient is φ = 1410048.

The previous prime is 2815963. The next prime is 2815973. The reversal of 2815965 is 5695182.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1205604 + 1610361 = 1098^2 + 1269^2 .

It is not a de Polignac number, because 2815965 - 2¹ = 2815963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2815963) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6681 + ... + 7089.

It is an arithmetic number, because the mean of its divisors is an integer number (133947).

2^2815965 is an apocalyptic number.

It is an amenable number.

2815965 is a deficient number, since it is larger than the sum of its proper divisors (2541915).

2815965 is a wasteful number, since it uses less digits than its factorization.

2815965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443 (or 434 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 2815965 is about 1678.0837285428. The cubic root of 2815965 is about 141.2133483624.

It can be divided in two parts, 28159 and 65, that added together give a square (28224 = 168²).

The spelling of 2815965 in words is "two million, eight hundred fifteen thousand, nine hundred sixty-five".