1405423051321 has 2 divisors, whose sum is σ = 1405423051322. Its totient is φ = 1405423051320.

The previous prime is 1405423051289. The next prime is 1405423051343. The reversal of 1405423051321 is 1231503245041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1394146947600 + 11276103721 = 1180740^2 + 106189^2 .

It is a cyclic number.

It is not a de Polignac number, because 1405423051321 - 2⁵ = 1405423051289 is a prime.

It is not a weakly prime, because it can be changed into another prime (1405423051381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702711525660 + 702711525661.

It is an arithmetic number, because the mean of its divisors is an integer number (702711525661).

Almost surely, 2^{1405423051321} is an apocalyptic number.

It is an amenable number.

1405423051321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405423051321 is an equidigital number, since it uses as much as digits as its factorization.

1405423051321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 1405423051321 its reverse (1231503245041), we get a palindrome (2636926296362).

The spelling of 1405423051321 in words is "one trillion, four hundred five billion, four hundred twenty-three million, fifty-one thousand, three hundred twenty-one".