11644541 has 4 divisors (see below), whose sum is σ = 12329532. Its totient is φ = 10959552.

The previous prime is 11644531. The next prime is 11644547. The reversal of 11644541 is 14544611.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7425625 + 4218916 = 2725^2 + 2054^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11644541 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11644541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11644547) 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, 342470 + ... + 342503.

It is an arithmetic number, because the mean of its divisors is an integer number (3082383).

Almost surely, 2^11644541 is an apocalyptic number.

It is an amenable number.

11644541 is a deficient number, since it is larger than the sum of its proper divisors (684991).

11644541 is an equidigital number, since it uses as much as digits as its factorization.

11644541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684990.

The product of its digits is 1920, while the sum is 26.

The square root of 11644541 is about 3412.4098522891. The cubic root of 11644541 is about 226.6596035381.

The spelling of 11644541 in words is "eleven million, six hundred forty-four thousand, five hundred forty-one".