11642643 has 16 divisors (see below), whose sum is σ = 17533600. Its totient is φ = 7633440.

The previous prime is 11642641. The next prime is 11642677. The reversal of 11642643 is 34624611.

11642643 is a `hidden beast` number, since 1 + 16 + 4 + 2 + 643 = 666.

11642643 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11642643 - 2¹ = 11642641 is a prime.

It is a super-2 number, since 2×11642643² = 271102272050898, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11642641) 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, 1888 + ... + 5181.

It is an arithmetic number, because the mean of its divisors is an integer number (1095850).

Almost surely, 2^11642643 is an apocalyptic number.

11642643 is a deficient number, since it is larger than the sum of its proper divisors (5890957).

11642643 is an equidigital number, since it uses as much as digits as its factorization.

11642643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7139 (or 7133 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 11642643 is about 3412.1317383712. The cubic root of 11642643 is about 226.6472880876.

The spelling of 11642643 in words is "eleven million, six hundred forty-two thousand, six hundred forty-three".