11561426 has 16 divisors (see below), whose sum is σ = 17864280. Its totient is φ = 5608320.

The previous prime is 11561423. The next prime is 11561447. The reversal of 11561426 is 62416511.

11561426 = 50² + 51² + ... + 326².

It can be written as a sum of positive squares in 4 ways, for example, as 6943225 + 4618201 = 2635^2 + 2149^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11561395 and 11561404.

It is not an unprimeable number, because it can be changed into a prime (11561423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22460 + ... + 22968.

Almost surely, 2^11561426 is an apocalyptic number.

11561426 is a deficient number, since it is larger than the sum of its proper divisors (6302854).

11561426 is a wasteful number, since it uses less digits than its factorization.

11561426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829.

The product of its digits is 1440, while the sum is 26.

The square root of 11561426 is about 3400.2096994156. The cubic root of 11561426 is about 226.1190408448.

Adding to 11561426 its reverse (62416511), we get a palindrome (73977937).

The spelling of 11561426 in words is "eleven million, five hundred sixty-one thousand, four hundred twenty-six".