1403021 has 2 divisors, whose sum is σ = 1403022. Its totient is φ = 1403020.

The previous prime is 1403009. The next prime is 1403057. The reversal of 1403021 is 1203041.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1357225 + 45796 = 1165^2 + 214^2 .

It is a cyclic number.

It is not a de Polignac number, because 1403021 - 2⁶ = 1402957 is a prime.

It is a Chen prime.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1402993 and 1403011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1403071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 701510 + 701511.

It is an arithmetic number, because the mean of its divisors is an integer number (701511).

2^1403021 is an apocalyptic number.

It is an amenable number.

1403021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1403021 is an equidigital number, since it uses as much as digits as its factorization.

1403021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1403021 is about 1184.4918741807. The cubic root of 1403021 is about 111.9493020971.

Adding to 1403021 its reverse (1203041), we get a palindrome (2606062).

The spelling of 1403021 in words is "one million, four hundred three thousand, twenty-one".