11605621 has 4 divisors (see below), whose sum is σ = 11622700. Its totient is φ = 11588544.

The previous prime is 11605619. The next prime is 11605651. The reversal of 11605621 is 12650611.

11605621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12650611 = 83 ⋅152417.

It can be written as a sum of positive squares in 2 ways, for example, as 2515396 + 9090225 = 1586^2 + 3015^2 .

It is a cyclic number.

It is not a de Polignac number, because 11605621 - 2¹ = 11605619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11605592 and 11605601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11605651) 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, 7476 + ... + 8893.

It is an arithmetic number, because the mean of its divisors is an integer number (2905675).

Almost surely, 2^11605621 is an apocalyptic number.

It is an amenable number.

11605621 is a deficient number, since it is larger than the sum of its proper divisors (17079).

11605621 is an equidigital number, since it uses as much as digits as its factorization.

11605621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17078.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 11605621 is about 3406.7023644575. The cubic root of 11605621 is about 226.4067972858.

The spelling of 11605621 in words is "eleven million, six hundred five thousand, six hundred twenty-one".