144275921 has 2 divisors, whose sum is σ = 144275922. Its totient is φ = 144275920.

The previous prime is 144275917. The next prime is 144275951. The reversal of 144275921 is 129572441.

144275921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143041600 + 1234321 = 11960^2 + 1111^2 .

It is a cyclic number.

It is not a de Polignac number, because 144275921 - 2² = 144275917 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (144275951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72137960 + 72137961.

It is an arithmetic number, because the mean of its divisors is an integer number (72137961).

Almost surely, 2^144275921 is an apocalyptic number.

It is an amenable number.

144275921 is a deficient number, since it is larger than the sum of its proper divisors (1).

144275921 is an equidigital number, since it uses as much as digits as its factorization.

144275921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 35.

The square root of 144275921 is about 12011.4912063407. The cubic root of 144275921 is about 524.4828419055.

The spelling of 144275921 in words is "one hundred forty-four million, two hundred seventy-five thousand, nine hundred twenty-one".