2643530 has 8 divisors (see below), whose sum is σ = 4758372. Its totient is φ = 1057408.

The previous prime is 2643523. The next prime is 2643547. The reversal of 2643530 is 353462.

It can be written as a sum of positive squares in 2 ways, for example, as 2505889 + 137641 = 1583^2 + 371^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 2643496 and 2643505.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132167 + ... + 132186.

2^2643530 is an apocalyptic number.

2643530 is a deficient number, since it is larger than the sum of its proper divisors (2114842).

2643530 is a wasteful number, since it uses less digits than its factorization.

2643530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264360.

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

The square root of 2643530 is about 1625.8936004548. The cubic root of 2643530 is about 138.2700376547.

Adding to 2643530 its reverse (353462), we get a palindrome (2996992).

The spelling of 2643530 in words is "two million, six hundred forty-three thousand, five hundred thirty".