144423421 has 2 divisors, whose sum is σ = 144423422. Its totient is φ = 144423420.

The previous prime is 144423353. The next prime is 144423431. The reversal of 144423421 is 124324441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82628100 + 61795321 = 9090^2 + 7861^2 .

It is a cyclic number.

It is not a de Polignac number, because 144423421 - 2⁹ = 144422909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144423431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72211710 + 72211711.

It is an arithmetic number, because the mean of its divisors is an integer number (72211711).

Almost surely, 2^144423421 is an apocalyptic number.

It is an amenable number.

144423421 is a deficient number, since it is larger than the sum of its proper divisors (1).

144423421 is an equidigital number, since it uses as much as digits as its factorization.

144423421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 25.

The square root of 144423421 is about 12017.6295915626. The cubic root of 144423421 is about 524.6615154506.

Adding to 144423421 its reverse (124324441), we get a palindrome (268747862).

The spelling of 144423421 in words is "one hundred forty-four million, four hundred twenty-three thousand, four hundred twenty-one".