1132821 has 12 divisors (see below), whose sum is σ = 1647360. Its totient is φ = 750120.

The previous prime is 1132811. The next prime is 1132823. The reversal of 1132821 is 1282311.

It is not a de Polignac number, because 1132821 - 2⁹ = 1132309 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1132794 and 1132803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1132823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1390 + ... + 2048.

It is an arithmetic number, because the mean of its divisors is an integer number (137280).

2^1132821 is an apocalyptic number.

It is an amenable number.

1132821 is a deficient number, since it is larger than the sum of its proper divisors (514539).

1132821 is a wasteful number, since it uses less digits than its factorization.

1132821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856 (or 853 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 1132821 is about 1064.3406409604. The cubic root of 1132821 is about 104.2446471727.

It can be divided in two parts, 1132 and 821, that added together give a triangular number (1953 = T₆₂).

The spelling of 1132821 in words is "one million, one hundred thirty-two thousand, eight hundred twenty-one".