2815489 has 4 divisors (see below), whose sum is σ = 2981124. Its totient is φ = 2649856.

The previous prime is 2815469. The next prime is 2815493. The reversal of 2815489 is 9845182.

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 2455489 + 360000 = 1567^2 + 600^2 .

It is a cyclic number.

It is not a de Polignac number, because 2815489 - 2⁵ = 2815457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2815469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82792 + ... + 82825.

It is an arithmetic number, because the mean of its divisors is an integer number (745281).

2^2815489 is an apocalyptic number.

It is an amenable number.

2815489 is a deficient number, since it is larger than the sum of its proper divisors (165635).

2815489 is a wasteful number, since it uses less digits than its factorization.

2815489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165634.

The product of its digits is 23040, while the sum is 37.

The square root of 2815489 is about 1677.9418941072. The cubic root of 2815489 is about 141.2053911918.

The spelling of 2815489 in words is "two million, eight hundred fifteen thousand, four hundred eighty-nine".