2012509 has 4 divisors (see below), whose sum is σ = 2024316. Its totient is φ = 2000704.

The previous prime is 2012471. The next prime is 2012519. The reversal of 2012509 is 9052102.

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 1625625 + 386884 = 1275^2 + 622^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012509 - 2¹⁵ = 1979741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012519) 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, 5644 + ... + 5989.

It is an arithmetic number, because the mean of its divisors is an integer number (506079).

2^2012509 is an apocalyptic number.

It is an amenable number.

2012509 is a deficient number, since it is larger than the sum of its proper divisors (11807).

2012509 is a wasteful number, since it uses less digits than its factorization.

2012509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11806.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 2012509 is about 1418.6292679908. The cubic root of 2012509 is about 126.2542317962.

The spelling of 2012509 in words is "two million, twelve thousand, five hundred nine".