1211257 has 4 divisors (see below), whose sum is σ = 1215396. Its totient is φ = 1207120.

The previous prime is 1211227. The next prime is 1211261. The reversal of 1211257 is 7521121.

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 553536 + 657721 = 744^2 + 811^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211257 - 2¹¹ = 1209209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1594 + ... + 2227.

It is an arithmetic number, because the mean of its divisors is an integer number (303849).

2^1211257 is an apocalyptic number.

It is an amenable number.

1211257 is a deficient number, since it is larger than the sum of its proper divisors (4139).

1211257 is an equidigital number, since it uses as much as digits as its factorization.

1211257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4138.

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

The square root of 1211257 is about 1100.5712153241. The cubic root of 1211257 is about 106.5971106863.

Adding to 1211257 its reverse (7521121), we get a palindrome (8732378).

It can be divided in two parts, 121 and 1257, that added together give a triangular number (1378 = T₅₂).

The spelling of 1211257 in words is "one million, two hundred eleven thousand, two hundred fifty-seven".