11990261 has 2 divisors, whose sum is σ = 11990262. Its totient is φ = 11990260.

The previous prime is 11990239. The next prime is 11990281. The reversal of 11990261 is 16209911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9796900 + 2193361 = 3130^2 + 1481^2 .

It is an emirp because it is prime and its reverse (16209911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11990261 - 2¹⁸ = 11728117 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11990201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5995130 + 5995131.

It is an arithmetic number, because the mean of its divisors is an integer number (5995131).

Almost surely, 2^11990261 is an apocalyptic number.

It is an amenable number.

11990261 is a deficient number, since it is larger than the sum of its proper divisors (1).

11990261 is an equidigital number, since it uses as much as digits as its factorization.

11990261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 29.

The square root of 11990261 is about 3462.6956262427. The cubic root of 11990261 is about 228.8808963478.

The spelling of 11990261 in words is "eleven million, nine hundred ninety thousand, two hundred sixty-one".