1181151 has 12 divisors (see below), whose sum is σ = 1752712. Its totient is φ = 765936.

The previous prime is 1181149. The next prime is 1181153. The reversal of 1181151 is 1511811.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1181149) and next prime (1181153).

It is not a de Polignac number, because 1181151 - 2¹ = 1181149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181153) 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 11 ways as a sum of consecutive naturals, for example, 1441 + ... + 2106.

2^1181151 is an apocalyptic number.

1181151 is a deficient number, since it is larger than the sum of its proper divisors (571561).

1181151 is a wasteful number, since it uses less digits than its factorization.

1181151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3590 (or 3587 counting only the distinct ones).

The product of its digits is 40, while the sum is 18.

The square root of 1181151 is about 1086.8077106830. The cubic root of 1181151 is about 105.7065277447.

Adding to 1181151 its reverse (1511811), we get a palindrome (2692962).

The spelling of 1181151 in words is "one million, one hundred eighty-one thousand, one hundred fifty-one".