1821141 has 24 divisors (see below), whose sum is σ = 3042624. Its totient is φ = 1028160.

The previous prime is 1821139. The next prime is 1821151. The reversal of 1821141 is 1411281.

It is not a de Polignac number, because 1821141 - 2¹ = 1821139 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1821101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8526 + ... + 8736.

It is an arithmetic number, because the mean of its divisors is an integer number (126776).

2^1821141 is an apocalyptic number.

It is an amenable number.

1821141 is a deficient number, since it is larger than the sum of its proper divisors (1221483).

1821141 is a wasteful number, since it uses less digits than its factorization.

1821141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361 (or 358 counting only the distinct ones).

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

The square root of 1821141 is about 1349.4965728004. The cubic root of 1821141 is about 122.1184239333.

The spelling of 1821141 in words is "one million, eight hundred twenty-one thousand, one hundred forty-one".