1136821 has 12 divisors (see below), whose sum is σ = 1362592. Its totient is φ = 929016.

The previous prime is 1136819. The next prime is 1136831. The reversal of 1136821 is 1286311.

It is not a de Polignac number, because 1136821 - 2¹ = 1136819 is a prime.

It is a hoax number, since the sum of its digits (22) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1136792 and 1136801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1136831) 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, 3550 + ... + 3856.

2^1136821 is an apocalyptic number.

It is an amenable number.

1136821 is a deficient number, since it is larger than the sum of its proper divisors (225771).

1136821 is an equidigital number, since it uses as much as digits as its factorization.

1136821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360 (or 337 counting only the distinct ones).

The product of its digits is 288, while the sum is 22.

The square root of 1136821 is about 1066.2180827579. The cubic root of 1136821 is about 104.3671992688.

The spelling of 1136821 in words is "one million, one hundred thirty-six thousand, eight hundred twenty-one".