11390261 has 2 divisors, whose sum is σ = 11390262. Its totient is φ = 11390260.

The previous prime is 11390213. The next prime is 11390273. The reversal of 11390261 is 16209311.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7187761 + 4202500 = 2681^2 + 2050^2 .

It is a cyclic number.

It is not a de Polignac number, because 11390261 - 2¹⁰ = 11389237 is a prime.

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 (11390161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5695130 + 5695131.

It is an arithmetic number, because the mean of its divisors is an integer number (5695131).

Almost surely, 2^11390261 is an apocalyptic number.

It is an amenable number.

11390261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11390261 is an equidigital number, since it uses as much as digits as its factorization.

11390261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 11390261 is about 3374.9460736433. The cubic root of 11390261 is about 224.9976032667.

Adding to 11390261 its reverse (16209311), we get a palindrome (27599572).

The spelling of 11390261 in words is "eleven million, three hundred ninety thousand, two hundred sixty-one".