10640243 has 4 divisors (see below), whose sum is σ = 10674768. Its totient is φ = 10605720.

The previous prime is 10640233. The next prime is 10640251. The reversal of 10640243 is 34204601.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10640243 - 2⁸ = 10639987 is a prime.

It is a super-2 number, since 2×10640243² = 226429542198098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10640233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16796 + ... + 17417.

It is an arithmetic number, because the mean of its divisors is an integer number (2668692).

Almost surely, 2^10640243 is an apocalyptic number.

10640243 is a deficient number, since it is larger than the sum of its proper divisors (34525).

10640243 is an equidigital number, since it uses as much as digits as its factorization.

10640243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34524.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 10640243 is about 3261.9385340622. The cubic root of 10640243 is about 219.9465641570.

Adding to 10640243 its reverse (34204601), we get a palindrome (44844844).

The spelling of 10640243 in words is "ten million, six hundred forty thousand, two hundred forty-three".