11611261 has 8 divisors (see below), whose sum is σ = 12261600. Its totient is φ = 10964880.

The previous prime is 11611253. The next prime is 11611273. The reversal of 11611261 is 16211611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11611261 - 2³ = 11611253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11612261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6606 + ... + 8176.

It is an arithmetic number, because the mean of its divisors is an integer number (1532700).

Almost surely, 2^11611261 is an apocalyptic number.

It is an amenable number.

11611261 is a deficient number, since it is larger than the sum of its proper divisors (650339).

11611261 is a wasteful number, since it uses less digits than its factorization.

11611261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979.

The product of its digits is 72, while the sum is 19.

The square root of 11611261 is about 3407.5300438881. The cubic root of 11611261 is about 226.4434670898.

Adding to 11611261 its reverse (16211611), we get a palindrome (27822872).

The spelling of 11611261 in words is "eleven million, six hundred eleven thousand, two hundred sixty-one".