11591506 has 4 divisors (see below), whose sum is σ = 17387262. Its totient is φ = 5795752.

The previous prime is 11591497. The next prime is 11591507. The reversal of 11591506 is 60519511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 8732025 + 2859481 = 2955^2 + 1691^2 .

It is a super-2 number, since 2×11591506² = 268726022696072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11591507) 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 as a sum of consecutive naturals, namely, 2897875 + ... + 2897878.

Almost surely, 2^11591506 is an apocalyptic number.

11591506 is a deficient number, since it is larger than the sum of its proper divisors (5795756).

11591506 is an equidigital number, since it uses as much as digits as its factorization.

11591506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5795755.

The product of its (nonzero) digits is 1350, while the sum is 28.

The square root of 11591506 is about 3404.6300826962. The cubic root of 11591506 is about 226.3149731490.

The spelling of 11591506 in words is "eleven million, five hundred ninety-one thousand, five hundred six".