2563345 has 16 divisors (see below), whose sum is σ = 3324240. Its totient is φ = 1890304.

The previous prime is 2563343. The next prime is 2563357. The reversal of 2563345 is 5433652.

It can be written as a sum of positive squares in 8 ways, for example, as 144 + 2563201 = 12^2 + 1601^2 .

It is a cyclic number.

It is not a de Polignac number, because 2563345 - 2¹ = 2563343 is a prime.

2563345 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2563343) 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, 4221 + ... + 4789.

It is an arithmetic number, because the mean of its divisors is an integer number (207765).

2^2563345 is an apocalyptic number.

It is an amenable number.

2563345 is a deficient number, since it is larger than the sum of its proper divisors (760895).

2563345 is a wasteful number, since it uses less digits than its factorization.

2563345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644.

The product of its digits is 10800, while the sum is 28.

The square root of 2563345 is about 1601.0449712610. The cubic root of 2563345 is about 136.8576317766.

Adding to 2563345 its reverse (5433652), we get a palindrome (7996997).

The spelling of 2563345 in words is "two million, five hundred sixty-three thousand, three hundred forty-five".