11421647 has 4 divisors (see below), whose sum is σ = 11430816. Its totient is φ = 11412480.

The previous prime is 11421629. The next prime is 11421661. The reversal of 11421647 is 74612411.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11421647 - 2¹⁰ = 11420623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11421677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2354 + ... + 5327.

It is an arithmetic number, because the mean of its divisors is an integer number (2857704).

Almost surely, 2^11421647 is an apocalyptic number.

11421647 is a deficient number, since it is larger than the sum of its proper divisors (9169).

11421647 is an equidigital number, since it uses as much as digits as its factorization.

11421647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9168.

The product of its digits is 1344, while the sum is 26.

The square root of 11421647 is about 3379.5927269421. The cubic root of 11421647 is about 225.2040749304.

The spelling of 11421647 in words is "eleven million, four hundred twenty-one thousand, six hundred forty-seven".