1217923 has 8 divisors (see below), whose sum is σ = 1399392. Its totient is φ = 1038336.

The previous prime is 1217921. The next prime is 1217927. The reversal of 1217923 is 3297121.

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 1217923 - 2¹ = 1217921 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1217921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1461 + ... + 2137.

It is an arithmetic number, because the mean of its divisors is an integer number (174924).

2^1217923 is an apocalyptic number.

1217923 is a deficient number, since it is larger than the sum of its proper divisors (181469).

1217923 is an equidigital number, since it uses as much as digits as its factorization.

1217923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941.

The product of its digits is 756, while the sum is 25.

The square root of 1217923 is about 1103.5954874862. The cubic root of 1217923 is about 106.7923009688.

The spelling of 1217923 in words is "one million, two hundred seventeen thousand, nine hundred twenty-three".