11145831 has 8 divisors (see below), whose sum is σ = 15373680. Its totient is φ = 7174272.

The previous prime is 11145817. The next prime is 11145839. The reversal of 11145831 is 13854111.

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

It is a de Polignac number, because none of the positive numbers 2^k-11145831 is a prime.

It is a super-2 number, since 2×11145831² = 248459097361122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11145839) 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 7 ways as a sum of consecutive naturals, for example, 63970 + ... + 64143.

It is an arithmetic number, because the mean of its divisors is an integer number (1921710).

Almost surely, 2^11145831 is an apocalyptic number.

11145831 is a deficient number, since it is larger than the sum of its proper divisors (4227849).

11145831 is a wasteful number, since it uses less digits than its factorization.

11145831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128145.

The product of its digits is 480, while the sum is 24.

The square root of 11145831 is about 3338.5372545473. The cubic root of 11145831 is about 223.3765013954.

Adding to 11145831 its reverse (13854111), we get a palindrome (24999942).

The spelling of 11145831 in words is "eleven million, one hundred forty-five thousand, eight hundred thirty-one".