11718261 has 6 divisors (see below), whose sum is σ = 16926390. Its totient is φ = 7812168.

The previous prime is 11718257. The next prime is 11718271. The reversal of 11718261 is 16281711.

It can be written as a sum of positive squares in only one way, i.e., 6922161 + 4796100 = 2631^2 + 2190^2 .

It is not a de Polignac number, because 11718261 - 2² = 11718257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11718211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 651006 + ... + 651023.

It is an arithmetic number, because the mean of its divisors is an integer number (2821065).

Almost surely, 2^11718261 is an apocalyptic number.

It is an amenable number.

11718261 is a deficient number, since it is larger than the sum of its proper divisors (5208129).

11718261 is a wasteful number, since it uses less digits than its factorization.

11718261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302035 (or 1302032 counting only the distinct ones).

The product of its digits is 672, while the sum is 27.

The square root of 11718261 is about 3423.1945606407. The cubic root of 11718261 is about 227.1369146931.

Adding to 11718261 its reverse (16281711), we get a palindrome (27999972).

The spelling of 11718261 in words is "eleven million, seven hundred eighteen thousand, two hundred sixty-one".