1205923 has 4 divisors (see below), whose sum is σ = 1212840. Its totient is φ = 1199008.

The previous prime is 1205921. The next prime is 1205947. The reversal of 1205923 is 3295021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3295021 = 31 ⋅106291.

It is a cyclic number.

It is not a de Polignac number, because 1205923 - 2¹ = 1205921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1205894 and 1205903.

It is not an unprimeable number, because it can be changed into a prime (1205921) 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, 3190 + ... + 3547.

It is an arithmetic number, because the mean of its divisors is an integer number (303210).

2^1205923 is an apocalyptic number.

1205923 is a deficient number, since it is larger than the sum of its proper divisors (6917).

1205923 is an equidigital number, since it uses as much as digits as its factorization.

1205923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6916.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 1205923 is about 1098.1452545087. The cubic root of 1205923 is about 106.4404069022.

The spelling of 1205923 in words is "one million, two hundred five thousand, nine hundred twenty-three".