1247923 has 2 divisors, whose sum is σ = 1247924. Its totient is φ = 1247922.

The previous prime is 1247893. The next prime is 1247947. The reversal of 1247923 is 3297421.

It is a strong prime.

It is an emirp because it is prime and its reverse (3297421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1247923 - 2¹⁷ = 1116851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1247891 and 1247900.

It is not a weakly prime, because it can be changed into another prime (1241923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623961 + 623962.

It is an arithmetic number, because the mean of its divisors is an integer number (623962).

2^1247923 is an apocalyptic number.

1247923 is a deficient number, since it is larger than the sum of its proper divisors (1).

1247923 is an equidigital number, since it uses as much as digits as its factorization.

1247923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 28.

The square root of 1247923 is about 1117.1047399416. The cubic root of 1247923 is about 107.6620379474.

The spelling of 1247923 in words is "one million, two hundred forty-seven thousand, nine hundred twenty-three".