1151111 has 4 divisors (see below), whose sum is σ = 1239672. Its totient is φ = 1062552.

The previous prime is 1151089. The next prime is 1151113. The reversal of 1151111 is 1111511.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1151111 - 2⁶ = 1151047 is a prime.

It is a Duffinian number.

1151111 is a modest number, since divided by 1111 gives 115 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 1151092 and 1151101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44261 + ... + 44286.

It is an arithmetic number, because the mean of its divisors is an integer number (309918).

2^1151111 is an apocalyptic number.

1151111 is a deficient number, since it is larger than the sum of its proper divisors (88561).

1151111 is an equidigital number, since it uses as much as digits as its factorization.

1151111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88560.

The product of its digits is 5, while the sum is 11.

The square root of 1151111 is about 1072.8984108479. The cubic root of 1151111 is about 104.8026830986.

Adding to 1151111 its reverse (1111511), we get a palindrome (2262622).

It can be divided in two parts, 11511 and 11, that multiplied together give a palindrome (126621).

The spelling of 1151111 in words is "one million, one hundred fifty-one thousand, one hundred eleven".