1401421321 has 2 divisors, whose sum is σ = 1401421322. Its totient is φ = 1401421320.

The previous prime is 1401421297. The next prime is 1401421337. The reversal of 1401421321 is 1231241041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 874030096 + 527391225 = 29564^2 + 22965^2 .

It is a cyclic number.

It is not a de Polignac number, because 1401421321 - 2⁹ = 1401420809 is a prime.

It is not a weakly prime, because it can be changed into another prime (1401421121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700710660 + 700710661.

It is an arithmetic number, because the mean of its divisors is an integer number (700710661).

Almost surely, 2^1401421321 is an apocalyptic number.

It is an amenable number.

1401421321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401421321 is an equidigital number, since it uses as much as digits as its factorization.

1401421321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1401421321 is about 37435.5622503523. The cubic root of 1401421321 is about 1119.0673892986.

Adding to 1401421321 its reverse (1231241041), we get a palindrome (2632662362).

The spelling of 1401421321 in words is "one billion, four hundred one million, four hundred twenty-one thousand, three hundred twenty-one".