11312643 has 16 divisors (see below), whose sum is σ = 15434496. Its totient is φ = 7368480.

The previous prime is 11312641. The next prime is 11312663. The reversal of 11312643 is 34621311.

It is not a de Polignac number, because 11312643 - 2¹ = 11312641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11312641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36696 + ... + 37002.

It is an arithmetic number, because the mean of its divisors is an integer number (964656).

Almost surely, 2^11312643 is an apocalyptic number.

11312643 is a deficient number, since it is larger than the sum of its proper divisors (4121853).

11312643 is a wasteful number, since it uses less digits than its factorization.

11312643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554.

The product of its digits is 432, while the sum is 21.

The square root of 11312643 is about 3363.4272699138. The cubic root of 11312643 is about 224.4853620481.

Multiplying 11312643 by its sum of digits (21), we get a triangular number (237565503 = T₂₁₇₉₇).

Adding to 11312643 its reverse (34621311), we get a palindrome (45933954).

The spelling of 11312643 in words is "eleven million, three hundred twelve thousand, six hundred forty-three".