11361605 has 4 divisors (see below), whose sum is σ = 13633932. Its totient is φ = 9089280.

The previous prime is 11361599. The next prime is 11361607. The reversal of 11361605 is 50616311.

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: 50616311 = 4079 ⋅12409.

It can be written as a sum of positive squares in 2 ways, for example, as 1331716 + 10029889 = 1154^2 + 3167^2 .

It is not a de Polignac number, because 11361605 - 2¹² = 11357509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11361607) 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 3 ways as a sum of consecutive naturals, for example, 1136156 + ... + 1136165.

It is an arithmetic number, because the mean of its divisors is an integer number (3408483).

Almost surely, 2^11361605 is an apocalyptic number.

It is an amenable number.

11361605 is a deficient number, since it is larger than the sum of its proper divisors (2272327).

11361605 is an equidigital number, since it uses as much as digits as its factorization.

11361605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272326.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 11361605 is about 3370.6979989314. The cubic root of 11361605 is about 224.8087593101.

Adding to 11361605 its reverse (50616311), we get a palindrome (61977916).

The spelling of 11361605 in words is "eleven million, three hundred sixty-one thousand, six hundred five".