1440412121 has 2 divisors, whose sum is σ = 1440412122. Its totient is φ = 1440412120.

The previous prime is 1440412087. The next prime is 1440412133. The reversal of 1440412121 is 1212140441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1305015625 + 135396496 = 36125^2 + 11636^2 .

It is a cyclic number.

It is not a de Polignac number, because 1440412121 - 2¹⁰ = 1440411097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1440412093 and 1440412102.

It is not a weakly prime, because it can be changed into another prime (1440402121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 720206060 + 720206061.

It is an arithmetic number, because the mean of its divisors is an integer number (720206061).

Almost surely, 2^1440412121 is an apocalyptic number.

It is an amenable number.

1440412121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1440412121 is an equidigital number, since it uses as much as digits as its factorization.

1440412121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 1440412121 is about 37952.7617045189. The cubic root of 1440412121 is about 1129.3509523566.

Adding to 1440412121 its reverse (1212140441), we get a palindrome (2652552562).

The spelling of 1440412121 in words is "one billion, four hundred forty million, four hundred twelve thousand, one hundred twenty-one".