1218523 has 8 divisors (see below), whose sum is σ = 1261008. Its totient is φ = 1176864.

The previous prime is 1218487. The next prime is 1218533. The reversal of 1218523 is 3258121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1218523 - 2¹⁷ = 1087451 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1218494 and 1218503.

It is not an unprimeable number, because it can be changed into a prime (1218533) 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 7 ways as a sum of consecutive naturals, for example, 4261 + ... + 4537.

It is an arithmetic number, because the mean of its divisors is an integer number (157626).

2^1218523 is an apocalyptic number.

1218523 is a deficient number, since it is larger than the sum of its proper divisors (42485).

1218523 is an equidigital number, since it uses as much as digits as its factorization.

1218523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413.

The product of its digits is 480, while the sum is 22.

The square root of 1218523 is about 1103.8672927485. The cubic root of 1218523 is about 106.8098348801.

The spelling of 1218523 in words is "one million, two hundred eighteen thousand, five hundred twenty-three".