1402442021 has 2 divisors, whose sum is σ = 1402442022. Its totient is φ = 1402442020.

The previous prime is 1402441967. The next prime is 1402442051. The reversal of 1402442021 is 1202442041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1333053121 + 69388900 = 36511^2 + 8330^2 .

It is a cyclic number.

It is not a de Polignac number, because 1402442021 - 2²⁶ = 1335333157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1402441984 and 1402442002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1402442051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701221010 + 701221011.

It is an arithmetic number, because the mean of its divisors is an integer number (701221011).

Almost surely, 2^1402442021 is an apocalyptic number.

It is an amenable number.

1402442021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1402442021 is an equidigital number, since it uses as much as digits as its factorization.

1402442021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1402442021 is about 37449.1925280105. The cubic root of 1402442021 is about 1119.3390075648.

Adding to 1402442021 its sum of digits (20), we get a palindrome (1402442041).

Adding to 1402442021 its reverse (1202442041), we get a palindrome (2604884062).

The spelling of 1402442021 in words is "one billion, four hundred two million, four hundred forty-two thousand, twenty-one".