11572565 has 16 divisors (see below), whose sum is σ = 14646528. Its totient is φ = 8760576.

The previous prime is 11572543. The next prime is 11572567. The reversal of 11572565 is 56527511.

It is a cyclic number.

It is not a de Polignac number, because 11572565 - 2¹⁶ = 11507029 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 (11572567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11357 + ... + 12333.

It is an arithmetic number, because the mean of its divisors is an integer number (915408).

Almost surely, 2^11572565 is an apocalyptic number.

It is an amenable number.

11572565 is a deficient number, since it is larger than the sum of its proper divisors (3073963).

11572565 is a wasteful number, since it uses less digits than its factorization.

11572565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108.

The product of its digits is 10500, while the sum is 32.

The square root of 11572565 is about 3401.8472922811. The cubic root of 11572565 is about 226.1916366049.

The spelling of 11572565 in words is "eleven million, five hundred seventy-two thousand, five hundred sixty-five".