2145065 has 16 divisors (see below), whose sum is σ = 2822736. Its totient is φ = 1555200.

The previous prime is 2145047. The next prime is 2145067. The reversal of 2145065 is 5605412.

It can be written as a sum of positive squares in 8 ways, for example, as 724201 + 1420864 = 851^2 + 1192^2 .

It is not a de Polignac number, because 2145065 - 2¹⁰ = 2144041 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 2145065.

It is not an unprimeable number, because it can be changed into a prime (2145067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3695 + ... + 4235.

It is an arithmetic number, because the mean of its divisors is an integer number (176421).

2^2145065 is an apocalyptic number.

It is an amenable number.

2145065 is a deficient number, since it is larger than the sum of its proper divisors (677671).

2145065 is a wasteful number, since it uses less digits than its factorization.

2145065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 2145065 is about 1464.6040420537. The cubic root of 2145065 is about 128.9674616970.

The spelling of 2145065 in words is "two million, one hundred forty-five thousand, sixty-five".