11941565 has 16 divisors (see below), whose sum is σ = 15586992. Its totient is φ = 8745984.

The previous prime is 11941547. The next prime is 11941571. The reversal of 11941565 is 56514911.

11941565 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 11449 + 11930116 = 107^2 + 3454^2 .

It is a cyclic number.

It is not a de Polignac number, because 11941565 - 2¹² = 11937469 is a prime.

It is a super-4 number, since 4×11941565⁴ (a number of 29 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1247 + ... + 5043.

It is an arithmetic number, because the mean of its divisors is an integer number (974187).

Almost surely, 2^11941565 is an apocalyptic number.

It is an amenable number.

11941565 is a deficient number, since it is larger than the sum of its proper divisors (3645427).

11941565 is a wasteful number, since it uses less digits than its factorization.

11941565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3856.

The product of its digits is 5400, while the sum is 32.

The square root of 11941565 is about 3455.6569563543. The cubic root of 11941565 is about 228.5706249042.

The spelling of 11941565 in words is "eleven million, nine hundred forty-one thousand, five hundred sixty-five".