1231273 has 4 divisors (see below), whose sum is σ = 1234948. Its totient is φ = 1227600.

The previous prime is 1231267. The next prime is 1231277. The reversal of 1231273 is 3721321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 451584 + 779689 = 672^2 + 883^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231273 is a prime.

It is a Duffinian number.

1231273 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1231273.

It is not an unprimeable number, because it can be changed into a prime (1231277) 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, 1278 + ... + 2023.

It is an arithmetic number, because the mean of its divisors is an integer number (308737).

2^1231273 is an apocalyptic number.

It is an amenable number.

1231273 is a deficient number, since it is larger than the sum of its proper divisors (3675).

1231273 is an equidigital number, since it uses as much as digits as its factorization.

1231273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3674.

The product of its digits is 252, while the sum is 19.

The square root of 1231273 is about 1109.6274149461. The cubic root of 1231273 is about 107.1810774966.

Adding to 1231273 its reverse (3721321), we get a palindrome (4952594).

The spelling of 1231273 in words is "one million, two hundred thirty-one thousand, two hundred seventy-three".