11771261 has 2 divisors, whose sum is σ = 11771262. Its totient is φ = 11771260.

The previous prime is 11771257. The next prime is 11771269. The reversal of 11771261 is 16217711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9114361 + 2656900 = 3019^2 + 1630^2 .

It is a cyclic number.

It is not a de Polignac number, because 11771261 - 2² = 11771257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11771261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11771269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5885630 + 5885631.

It is an arithmetic number, because the mean of its divisors is an integer number (5885631).

Almost surely, 2^11771261 is an apocalyptic number.

It is an amenable number.

11771261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11771261 is an equidigital number, since it uses as much as digits as its factorization.

11771261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 588, while the sum is 26.

The square root of 11771261 is about 3430.9271341723. The cubic root of 11771261 is about 227.4788355306.

Adding to 11771261 its reverse (16217711), we get a palindrome (27988972).

The spelling of 11771261 in words is "eleven million, seven hundred seventy-one thousand, two hundred sixty-one".