2643305 has 12 divisors (see below), whose sum is σ = 3690180. Its totient is φ = 1812384.

The previous prime is 2643283. The next prime is 2643307. The reversal of 2643305 is 5033462.

It can be written as a sum of positive squares in 2 ways, for example, as 1073296 + 1570009 = 1036^2 + 1253^2 .

It is not a de Polignac number, because 2643305 - 2⁶ = 2643241 is a prime.

It is a super-2 number, since 2×2643305² = 13974122646050, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2⁵ + 6 + 4¹⁰ + 3⁵ + 3¹³ + 0 + 5³ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2643307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5150 + ... + 5639.

It is an arithmetic number, because the mean of its divisors is an integer number (307515).

2^2643305 is an apocalyptic number.

It is an amenable number.

2643305 is a deficient number, since it is larger than the sum of its proper divisors (1046875).

2643305 is a wasteful number, since it uses less digits than its factorization.

2643305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10808 (or 10801 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 2643305 is about 1625.8244062629. The cubic root of 2643305 is about 138.2661146627.

Adding to 2643305 its reverse (5033462), we get a palindrome (7676767).

The spelling of 2643305 in words is "two million, six hundred forty-three thousand, three hundred five".