1247873 has 6 divisors (see below), whose sum is σ = 1371762. Its totient is φ = 1134320.

The previous prime is 1247867. The next prime is 1247879. The reversal of 1247873 is 3787421.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1247867) and next prime (1247879).

It can be written as a sum of positive squares in only one way, i.e., 1024144 + 223729 = 1012^2 + 473^2 .

It is not a de Polignac number, because 1247873 - 2¹⁸ = 985729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1247879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5036 + ... + 5277.

It is an arithmetic number, because the mean of its divisors is an integer number (228627).

2^1247873 is an apocalyptic number.

It is an amenable number.

1247873 is a deficient number, since it is larger than the sum of its proper divisors (123889).

1247873 is a wasteful number, since it uses less digits than its factorization.

1247873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10335 (or 10324 counting only the distinct ones).

The product of its digits is 9408, while the sum is 32.

The square root of 1247873 is about 1117.0823604372. The cubic root of 1247873 is about 107.6606000452.

It can be divided in two parts, 124 and 7873, that added together give a palindrome (7997).

The spelling of 1247873 in words is "one million, two hundred forty-seven thousand, eight hundred seventy-three".