2115965 has 8 divisors (see below), whose sum is σ = 2558520. Its totient is φ = 1679872.

The previous prime is 2115961. The next prime is 2115979. The reversal of 2115965 is 5695112.

It can be written as a sum of positive squares in 4 ways, for example, as 702244 + 1413721 = 838^2 + 1189^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2115965 - 2² = 2115961 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 860 + ... + 2229.

It is an arithmetic number, because the mean of its divisors is an integer number (319815).

2^2115965 is an apocalyptic number.

It is an amenable number.

2115965 is a deficient number, since it is larger than the sum of its proper divisors (442555).

2115965 is a wasteful number, since it uses less digits than its factorization.

2115965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3231.

The product of its digits is 2700, while the sum is 29.

The square root of 2115965 is about 1454.6356932236. The cubic root of 2115965 is about 128.3816126140.

The spelling of 2115965 in words is "two million, one hundred fifteen thousand, nine hundred sixty-five".