1406431121 has 2 divisors, whose sum is σ = 1406431122. Its totient is φ = 1406431120.

The previous prime is 1406431079. The next prime is 1406431151. The reversal of 1406431121 is 1211346041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1401678721 + 4752400 = 37439^2 + 2180^2 .

It is an emirp because it is prime and its reverse (1211346041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1406431121 - 2¹⁸ = 1406168977 is a prime.

It is not a weakly prime, because it can be changed into another prime (1406431151) 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, 703215560 + 703215561.

It is an arithmetic number, because the mean of its divisors is an integer number (703215561).

Almost surely, 2^1406431121 is an apocalyptic number.

It is an amenable number.

1406431121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1406431121 is an equidigital number, since it uses as much as digits as its factorization.

1406431121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1406431121 is about 37502.4148689121. The cubic root of 1406431121 is about 1120.3992839231.

Adding to 1406431121 its reverse (1211346041), we get a palindrome (2617777162).

The spelling of 1406431121 in words is "one billion, four hundred six million, four hundred thirty-one thousand, one hundred twenty-one".