2012645 has 4 divisors (see below), whose sum is σ = 2415180. Its totient is φ = 1610112.

The previous prime is 2012641. The next prime is 2012657. The reversal of 2012645 is 5462102.

It is a happy number.

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 1267876 + 744769 = 1126^2 + 863^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012645 - 2² = 2012641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2012641) 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, 201260 + ... + 201269.

It is an arithmetic number, because the mean of its divisors is an integer number (603795).

2^2012645 is an apocalyptic number.

It is an amenable number.

2012645 is a deficient number, since it is larger than the sum of its proper divisors (402535).

2012645 is an equidigital number, since it uses as much as digits as its factorization.

2012645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402534.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2012645 is about 1418.6772007754. The cubic root of 2012645 is about 126.2570757071.

Adding to 2012645 its reverse (5462102), we get a palindrome (7474747).

The spelling of 2012645 in words is "two million, twelve thousand, six hundred forty-five".