1223919 has 12 divisors (see below), whose sum is σ = 1778400. Its totient is φ = 811104.

The previous prime is 1223897. The next prime is 1223921. The reversal of 1223919 is 9193221.

It is not a de Polignac number, because 1223919 - 2¹⁶ = 1158383 is a prime.

It is a super-2 number, since 2×1223919² = 2995955437122, which contains 22 as substring.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1223892 and 1223901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223939) 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 11 ways as a sum of consecutive naturals, for example, 1867 + ... + 2435.

It is an arithmetic number, because the mean of its divisors is an integer number (148200).

2^1223919 is an apocalyptic number.

1223919 is a deficient number, since it is larger than the sum of its proper divisors (554481).

1223919 is a wasteful number, since it uses less digits than its factorization.

1223919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814 (or 811 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

The square root of 1223919 is about 1106.3087272547. The cubic root of 1223919 is about 106.9672651487.

The spelling of 1223919 in words is "one million, two hundred twenty-three thousand, nine hundred nineteen".