11726513 has 4 divisors (see below), whose sum is σ = 11733540. Its totient is φ = 11719488.

The previous prime is 11726497. The next prime is 11726531. The reversal of 11726513 is 31562711.

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 9314704 + 2411809 = 3052^2 + 1553^2 .

It is a cyclic number.

It is not a de Polignac number, because 11726513 - 2⁴ = 11726497 is a prime.

It is a super-2 number, since 2×11726513² = 275022214278338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11726543) 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, 581 + ... + 4877.

It is an arithmetic number, because the mean of its divisors is an integer number (2933385).

Almost surely, 2^11726513 is an apocalyptic number.

It is an amenable number.

11726513 is a deficient number, since it is larger than the sum of its proper divisors (7027).

11726513 is an equidigital number, since it uses as much as digits as its factorization.

11726513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7026.

The product of its digits is 1260, while the sum is 26.

The square root of 11726513 is about 3424.3996554141. The cubic root of 11726513 is about 227.1902187918.

The spelling of 11726513 in words is "eleven million, seven hundred twenty-six thousand, five hundred thirteen".