12011261 has 4 divisors (see below), whose sum is σ = 12018300. Its totient is φ = 12004224.

The previous prime is 12011257. The next prime is 12011281. The reversal of 12011261 is 16211021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8702500 + 3308761 = 2950^2 + 1819^2 .

It is a cyclic number.

It is not a de Polignac number, because 12011261 - 2² = 12011257 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011281) 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, 845 + ... + 4973.

It is an arithmetic number, because the mean of its divisors is an integer number (3004575).

Almost surely, 2^12011261 is an apocalyptic number.

It is an amenable number.

12011261 is a deficient number, since it is larger than the sum of its proper divisors (7039).

12011261 is an equidigital number, since it uses as much as digits as its factorization.

12011261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7038.

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

The square root of 12011261 is about 3465.7266193397. The cubic root of 12011261 is about 229.0144407158.

Adding to 12011261 its reverse (16211021), we get a palindrome (28222282).

The spelling of 12011261 in words is "twelve million, eleven thousand, two hundred sixty-one".