1223864 has 16 divisors (see below), whose sum is σ = 2430000. Its totient is φ = 575872.

The previous prime is 1223863. The next prime is 1223867. The reversal of 1223864 is 4683221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223863) 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, 4364 + ... + 4635.

It is an arithmetic number, because the mean of its divisors is an integer number (151875).

2^1223864 is an apocalyptic number.

It is an amenable number.

1223864 is a deficient number, since it is larger than the sum of its proper divisors (1206136).

1223864 is a wasteful number, since it uses less digits than its factorization.

1223864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9022 (or 9018 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 1223864 is about 1106.2838695380. The cubic root of 1223864 is about 106.9656628401.

The spelling of 1223864 in words is "one million, two hundred twenty-three thousand, eight hundred sixty-four".