11417561 has 4 divisors (see below), whose sum is σ = 11811300. Its totient is φ = 11023824.

The previous prime is 11417551. The next prime is 11417573. The reversal of 11417561 is 16571411.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16571411 = 107 ⋅154873.

It can be written as a sum of positive squares in 2 ways, for example, as 7595536 + 3822025 = 2756^2 + 1955^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11417561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11417561.

It is not an unprimeable number, because it can be changed into a prime (11417521) 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, 196826 + ... + 196883.

It is an arithmetic number, because the mean of its divisors is an integer number (2952825).

Almost surely, 2^11417561 is an apocalyptic number.

It is an amenable number.

11417561 is a deficient number, since it is larger than the sum of its proper divisors (393739).

11417561 is an equidigital number, since it uses as much as digits as its factorization.

11417561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393738.

The product of its digits is 840, while the sum is 26.

The square root of 11417561 is about 3378.9881621574. The cubic root of 11417561 is about 225.1772167607.

Adding to 11417561 its reverse (16571411), we get a palindrome (27988972).

The spelling of 11417561 in words is "eleven million, four hundred seventeen thousand, five hundred sixty-one".