1141821 has 12 divisors (see below), whose sum is σ = 1658748. Its totient is φ = 756864.

The previous prime is 1141813. The next prime is 1141837. The reversal of 1141821 is 1281411.

It can be written as a sum of positive squares in 2 ways, for example, as 632025 + 509796 = 795^2 + 714^2 .

It is not a de Polignac number, because 1141821 - 2³ = 1141813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1141794 and 1141803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1141801) 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, 2421 + ... + 2853.

It is an arithmetic number, because the mean of its divisors is an integer number (138229).

2^1141821 is an apocalyptic number.

It is an amenable number.

1141821 is a deficient number, since it is larger than the sum of its proper divisors (516927).

1141821 is a wasteful number, since it uses less digits than its factorization.

1141821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732 (or 729 counting only the distinct ones).

The product of its digits is 64, while the sum is 18.

The square root of 1141821 is about 1068.5602463128. The cubic root of 1141821 is about 104.5199857992.

It can be divided in two parts, 11418 and 21, that multiplied together give a triangular number (239778 = T₆₉₂).

The spelling of 1141821 in words is "one million, one hundred forty-one thousand, eight hundred twenty-one".