1427021 has 2 divisors, whose sum is σ = 1427022. Its totient is φ = 1427020.

The previous prime is 1427017. The next prime is 1427039. The reversal of 1427021 is 1207241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 978121 + 448900 = 989^2 + 670^2 .

It is a cyclic number.

It is not a de Polignac number, because 1427021 - 2² = 1427017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a zygodrome in base 3.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1427221) 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 as a sum of consecutive naturals, namely, 713510 + 713511.

It is an arithmetic number, because the mean of its divisors is an integer number (713511).

2^1427021 is an apocalyptic number.

It is an amenable number.

1427021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1427021 is an equidigital number, since it uses as much as digits as its factorization.

1427021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 1427021 is about 1194.5798424551. The cubic root of 1427021 is about 112.5840294015.

The spelling of 1427021 in words is "one million, four hundred twenty-seven thousand, twenty-one".