11819261 has 4 divisors (see below), whose sum is σ = 11838624. Its totient is φ = 11799900.

The previous prime is 11819257. The next prime is 11819279. The reversal of 11819261 is 16291811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11819261 - 2² = 11819257 is a prime.

It is a super-2 number, since 2×11819261² = 279389861172242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11819161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8735 + ... + 9996.

It is an arithmetic number, because the mean of its divisors is an integer number (2959656).

Almost surely, 2^11819261 is an apocalyptic number.

It is an amenable number.

11819261 is a deficient number, since it is larger than the sum of its proper divisors (19363).

11819261 is an equidigital number, since it uses as much as digits as its factorization.

11819261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19362.

The product of its digits is 864, while the sum is 29.

The square root of 11819261 is about 3437.9152112872. The cubic root of 11819261 is about 227.7876151391.

The spelling of 11819261 in words is "eleven million, eight hundred nineteen thousand, two hundred sixty-one".