11427565 has 4 divisors (see below), whose sum is σ = 13713084. Its totient is φ = 9142048.

The previous prime is 11427547. The next prime is 11427583. The reversal of 11427565 is 56572411.

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

It is an interprime number because it is at equal distance from previous prime (11427547) and next prime (11427583).

It can be written as a sum of positive squares in 2 ways, for example, as 8462281 + 2965284 = 2909^2 + 1722^2 .

It is a cyclic number.

It is not a de Polignac number, because 11427565 - 2²¹ = 9330413 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 3 ways as a sum of consecutive naturals, for example, 1142752 + ... + 1142761.

It is an arithmetic number, because the mean of its divisors is an integer number (3428271).

Almost surely, 2^11427565 is an apocalyptic number.

It is an amenable number.

11427565 is a deficient number, since it is larger than the sum of its proper divisors (2285519).

11427565 is an equidigital number, since it uses as much as digits as its factorization.

11427565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2285518.

The product of its digits is 8400, while the sum is 31.

The square root of 11427565 is about 3380.4681628437. The cubic root of 11427565 is about 225.2429638810.

Adding to 11427565 its reverse (56572411), we get a palindrome (67999976).

It can be divided in two parts, 1142756 and 5, that added together give a square (1142761 = 1069²).

The spelling of 11427565 in words is "eleven million, four hundred twenty-seven thousand, five hundred sixty-five".