1223391 has 24 divisors (see below), whose sum is σ = 1873920. Its totient is φ = 707616.

The previous prime is 1223381. The next prime is 1223419. The reversal of 1223391 is 1933221.

It is a happy number.

It is not a de Polignac number, because 1223391 - 2⁷ = 1223263 is a prime.

Its product of digits (324) is a multiple of the sum of its prime divisors (162).

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9570 + ... + 9696.

It is an arithmetic number, because the mean of its divisors is an integer number (78080).

2^1223391 is an apocalyptic number.

1223391 is a deficient number, since it is larger than the sum of its proper divisors (650529).

1223391 is a wasteful number, since it uses less digits than its factorization.

1223391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175 (or 162 counting only the distinct ones).

The product of its digits is 324, while the sum is 21.

The square root of 1223391 is about 1106.0700701131. The cubic root of 1223391 is about 106.9518810043.

The spelling of 1223391 in words is "one million, two hundred twenty-three thousand, three hundred ninety-one".