1408021 has 2 divisors, whose sum is σ = 1408022. Its totient is φ = 1408020.

The previous prime is 1408009. The next prime is 1408027. The reversal of 1408021 is 1208041.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 902500 + 505521 = 950^2 + 711^2 .

It is a cyclic number.

It is not a de Polignac number, because 1408021 - 2⁷ = 1407893 is a prime.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 1407986 and 1408004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1408027) 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, 704010 + 704011.

It is an arithmetic number, because the mean of its divisors is an integer number (704011).

2^1408021 is an apocalyptic number.

It is an amenable number.

1408021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1408021 is an equidigital number, since it uses as much as digits as its factorization.

1408021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1408021 is about 1186.6006067755. The cubic root of 1408021 is about 112.0821304472.

The spelling of 1408021 in words is "one million, four hundred eight thousand, twenty-one".