1228311 has 32 divisors (see below), whose sum is σ = 2132480. Its totient is φ = 684288.

The previous prime is 1228309. The next prime is 1228327. The reversal of 1228311 is 1138221.

It is not a de Polignac number, because 1228311 - 2¹ = 1228309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228351) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12615 + ... + 12711.

It is an arithmetic number, because the mean of its divisors is an integer number (66640).

2^1228311 is an apocalyptic number.

1228311 is a deficient number, since it is larger than the sum of its proper divisors (904169).

1228311 is an equidigital number, since it uses as much as digits as its factorization.

1228311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180 (or 174 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 1228311 is about 1108.2919290512. The cubic root of 1228311 is about 107.0950621110.

The spelling of 1228311 in words is "one million, two hundred twenty-eight thousand, three hundred eleven".