1218023 has 4 divisors (see below), whose sum is σ = 1224528. Its totient is φ = 1211520.

The previous prime is 1218017. The next prime is 1218043. The reversal of 1218023 is 3208121.

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

It is a cyclic number.

It is not a de Polignac number, because 1218023 - 2¹⁸ = 955879 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1217992 and 1218010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218043) 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, 2963 + ... + 3348.

It is an arithmetic number, because the mean of its divisors is an integer number (306132).

2^1218023 is an apocalyptic number.

1218023 is a deficient number, since it is larger than the sum of its proper divisors (6505).

1218023 is an equidigital number, since it uses as much as digits as its factorization.

1218023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6504.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1218023 is about 1103.6407930119. The cubic root of 1218023 is about 106.7952236872.

The spelling of 1218023 in words is "one million, two hundred eighteen thousand, twenty-three".