1821027 has 16 divisors (see below), whose sum is σ = 2667168. Its totient is φ = 1098240.

The previous prime is 1821019. The next prime is 1821037. The reversal of 1821027 is 7201281.

It is not a de Polignac number, because 1821027 - 2³ = 1821019 is a prime.

It is a super-2 number, since 2×1821027² = 6632278669458, which contains 22 as substring.

1821027 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1820994 and 1821012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1821037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1627 + ... + 2507.

It is an arithmetic number, because the mean of its divisors is an integer number (166698).

2^1821027 is an apocalyptic number.

1821027 is a deficient number, since it is larger than the sum of its proper divisors (846141).

1821027 is a wasteful number, since it uses less digits than its factorization.

1821027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 1821027 is about 1349.4543341662. The cubic root of 1821027 is about 122.1158757523.

The spelling of 1821027 in words is "one million, eight hundred twenty-one thousand, twenty-seven".