11141591 has 4 divisors (see below), whose sum is σ = 11626032. Its totient is φ = 10657152.

The previous prime is 11141587. The next prime is 11141609. The reversal of 11141591 is 19514111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19514111 = 239 ⋅81649.

It is a cyclic number.

It is not a de Polignac number, because 11141591 - 2² = 11141587 is a prime.

It is a super-2 number, since 2×11141591² = 248270100022562, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 484417 = 11141591 / (1 + 1 + 1 + 4 + 1 + 5 + 9 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11141521) 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 3 ways as a sum of consecutive naturals, for example, 242186 + ... + 242231.

It is an arithmetic number, because the mean of its divisors is an integer number (2906508).

Almost surely, 2^11141591 is an apocalyptic number.

11141591 is a deficient number, since it is larger than the sum of its proper divisors (484441).

11141591 is an equidigital number, since it uses as much as digits as its factorization.

11141591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484440.

The product of its digits is 180, while the sum is 23.

The square root of 11141591 is about 3337.9021855051. The cubic root of 11141591 is about 223.3481728215.

The spelling of 11141591 in words is "eleven million, one hundred forty-one thousand, five hundred ninety-one".