11515791 has 8 divisors (see below), whose sum is σ = 17547904. Its totient is φ = 6580440.

The previous prime is 11515789. The next prime is 11515811. The reversal of 11515791 is 19751511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11515791 - 2¹ = 11515789 is a prime.

It is a super-2 number, since 2×11515791² = 265226884711362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11515771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274165 + ... + 274206.

It is an arithmetic number, because the mean of its divisors is an integer number (2193488).

Almost surely, 2^11515791 is an apocalyptic number.

11515791 is a deficient number, since it is larger than the sum of its proper divisors (6032113).

11515791 is an equidigital number, since it uses as much as digits as its factorization.

11515791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548381.

The product of its digits is 1575, while the sum is 30.

The square root of 11515791 is about 3393.4924487908. The cubic root of 11515791 is about 225.8211378820.

The spelling of 11515791 in words is "eleven million, five hundred fifteen thousand, seven hundred ninety-one".