1821053 has 8 divisors (see below), whose sum is σ = 1978368. Its totient is φ = 1666224.

The previous prime is 1821037. The next prime is 1821067. The reversal of 1821053 is 3501281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1821053 - 2⁴ = 1821037 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 (1821013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1100 + ... + 2202.

It is an arithmetic number, because the mean of its divisors is an integer number (247296).

2^1821053 is an apocalyptic number.

1821053 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1821053 is a deficient number, since it is larger than the sum of its proper divisors (157315).

1821053 is a wasteful number, since it uses less digits than its factorization.

1821053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1821053 is about 1349.4639676553. The cubic root of 1821053 is about 122.1164569258.

The spelling of 1821053 in words is "one million, eight hundred twenty-one thousand, fifty-three".