1121257 has 2 divisors, whose sum is σ = 1121258. Its totient is φ = 1121256.

The previous prime is 1121249. The next prime is 1121261. The reversal of 1121257 is 7521211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1073296 + 47961 = 1036^2 + 219^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121257 - 2³ = 1121249 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1121297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560628 + 560629.

It is an arithmetic number, because the mean of its divisors is an integer number (560629).

2^1121257 is an apocalyptic number.

It is an amenable number.

1121257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121257 is an equidigital number, since it uses as much as digits as its factorization.

1121257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 140, while the sum is 19.

The square root of 1121257 is about 1058.8942345674. The cubic root of 1121257 is about 103.8887184943. Note that the first 3 decimals are identical.

Adding to 1121257 its reverse (7521211), we get a palindrome (8642468).

It can be divided in two parts, 1121 and 257, that added together give a triangular number (1378 = T₅₂).

The spelling of 1121257 in words is "one million, one hundred twenty-one thousand, two hundred fifty-seven".