1445142121 has 2 divisors, whose sum is σ = 1445142122. Its totient is φ = 1445142120.

The previous prime is 1445142077. The next prime is 1445142143. The reversal of 1445142121 is 1212415441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1431562896 + 13579225 = 37836^2 + 3685^2 .

It is a cyclic number.

It is not a de Polignac number, because 1445142121 - 2⁷ = 1445141993 is a prime.

It is not a weakly prime, because it can be changed into another prime (1445140121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722571060 + 722571061.

It is an arithmetic number, because the mean of its divisors is an integer number (722571061).

Almost surely, 2^1445142121 is an apocalyptic number.

It is an amenable number.

1445142121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1445142121 is an equidigital number, since it uses as much as digits as its factorization.

1445142121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1280, while the sum is 25.

The square root of 1445142121 is about 38015.0249375165. The cubic root of 1445142121 is about 1130.5857826376.

Adding to 1445142121 its reverse (1212415441), we get a palindrome (2657557562).

The spelling of 1445142121 in words is "one billion, four hundred forty-five million, one hundred forty-two thousand, one hundred twenty-one".