1135221 has 4 divisors (see below), whose sum is σ = 1513632. Its totient is φ = 756812.

The previous prime is 1135217. The next prime is 1135229. The reversal of 1135221 is 1225311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1225311 = 3 ⋅408437.

It is a cyclic number.

It is not a de Polignac number, because 1135221 - 2² = 1135217 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 1135221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1135229) 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, 189201 + ... + 189206.

It is an arithmetic number, because the mean of its divisors is an integer number (378408).

2^1135221 is an apocalyptic number.

It is an amenable number.

1135221 is a deficient number, since it is larger than the sum of its proper divisors (378411).

1135221 is an equidigital number, since it uses as much as digits as its factorization.

1135221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378410.

The product of its digits is 60, while the sum is 15.

The square root of 1135221 is about 1065.4675030239. The cubic root of 1135221 is about 104.3182129812.

The spelling of 1135221 in words is "one million, one hundred thirty-five thousand, two hundred twenty-one".