1223381 has 2 divisors, whose sum is σ = 1223382. Its totient is φ = 1223380.

The previous prime is 1223357. The next prime is 1223419. The reversal of 1223381 is 1833221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1136356 + 87025 = 1066^2 + 295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223381 is a prime.

It is a super-2 number, since 2×1223381² = 2993322142322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611690 + 611691.

It is an arithmetic number, because the mean of its divisors is an integer number (611691).

2^1223381 is an apocalyptic number.

It is an amenable number.

1223381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223381 is an equidigital number, since it uses as much as digits as its factorization.

1223381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 20.

The square root of 1223381 is about 1106.0655495946. The cubic root of 1223381 is about 106.9515895953.

The spelling of 1223381 in words is "one million, two hundred twenty-three thousand, three hundred eighty-one".