1211261 has 2 divisors, whose sum is σ = 1211262. Its totient is φ = 1211260.

The previous prime is 1211227. The next prime is 1211279. The reversal of 1211261 is 1621121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 828100 + 383161 = 910^2 + 619^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211261 - 2¹⁴ = 1194877 is a prime.

It is a super-3 number, since 3×1211261³ = 5331316393333117743, which contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211281) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605630 + 605631.

It is an arithmetic number, because the mean of its divisors is an integer number (605631).

2^1211261 is an apocalyptic number.

It is an amenable number.

1211261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211261 is an equidigital number, since it uses as much as digits as its factorization.

1211261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24, while the sum is 14.

The square root of 1211261 is about 1100.5730325608. The cubic root of 1211261 is about 106.5972280266.

Adding to 1211261 its reverse (1621121), we get a palindrome (2832382).

The spelling of 1211261 in words is "one million, two hundred eleven thousand, two hundred sixty-one".