1223881 has 4 divisors (see below), whose sum is σ = 1295892. Its totient is φ = 1151872.

The previous prime is 1223879. The next prime is 1223897. The reversal of 1223881 is 1883221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1121481 + 102400 = 1059^2 + 320^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223881 - 2¹ = 1223879 is a prime.

It is a super-2 number, since 2×1223881² = 2995769404322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223281) 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, 35980 + ... + 36013.

It is an arithmetic number, because the mean of its divisors is an integer number (323973).

2^1223881 is an apocalyptic number.

It is an amenable number.

1223881 is a deficient number, since it is larger than the sum of its proper divisors (72011).

1223881 is an equidigital number, since it uses as much as digits as its factorization.

1223881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72010.

The product of its digits is 768, while the sum is 25.

The square root of 1223881 is about 1106.2915528919. The cubic root of 1223881 is about 106.9661581042.

The spelling of 1223881 in words is "one million, two hundred twenty-three thousand, eight hundred eighty-one".