1247123 has 4 divisors (see below), whose sum is σ = 1249920. Its totient is φ = 1244328.

The previous prime is 1247119. The next prime is 1247167. The reversal of 1247123 is 3217421.

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 1247123 - 2² = 1247119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1247095 and 1247104.

It is not an unprimeable number, because it can be changed into a prime (1247923) 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, 563 + ... + 1676.

It is an arithmetic number, because the mean of its divisors is an integer number (312480).

2^1247123 is an apocalyptic number.

1247123 is a deficient number, since it is larger than the sum of its proper divisors (2797).

1247123 is an equidigital number, since it uses as much as digits as its factorization.

1247123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2796.

The product of its digits is 336, while the sum is 20.

The square root of 1247123 is about 1116.7466140535. The cubic root of 1247123 is about 107.6390269011.

The spelling of 1247123 in words is "one million, two hundred forty-seven thousand, one hundred twenty-three".