11421165 has 48 divisors (see below), whose sum is σ = 21833280. Its totient is φ = 5080320.

The previous prime is 11421149. The next prime is 11421167. The reversal of 11421165 is 56112411.

It is not a de Polignac number, because 11421165 - 2⁴ = 11421149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11421167) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29946 + ... + 30324.

It is an arithmetic number, because the mean of its divisors is an integer number (454860).

Almost surely, 2^11421165 is an apocalyptic number.

11421165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11421165 is a deficient number, since it is larger than the sum of its proper divisors (10412115).

11421165 is a wasteful number, since it uses less digits than its factorization.

11421165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442 (or 435 counting only the distinct ones).

The product of its digits is 240, while the sum is 21.

The square root of 11421165 is about 3379.5214158221. The cubic root of 11421165 is about 225.2009069725.

Adding to 11421165 its reverse (56112411), we get a palindrome (67533576).

The spelling of 11421165 in words is "eleven million, four hundred twenty-one thousand, one hundred sixty-five".