144231421 has 2 divisors, whose sum is σ = 144231422. Its totient is φ = 144231420.

The previous prime is 144231403. The next prime is 144231431. The reversal of 144231421 is 124132441.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86304100 + 57927321 = 9290^2 + 7611^2 .

It is a cyclic number.

It is not a de Polignac number, because 144231421 - 2⁷ = 144231293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 144231392 and 144231401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144231401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72115710 + 72115711.

It is an arithmetic number, because the mean of its divisors is an integer number (72115711).

Almost surely, 2^144231421 is an apocalyptic number.

It is an amenable number.

144231421 is a deficient number, since it is larger than the sum of its proper divisors (1).

144231421 is an equidigital number, since it uses as much as digits as its factorization.

144231421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 22.

The square root of 144231421 is about 12009.6386706678. The cubic root of 144231421 is about 524.4289130949.

Adding to 144231421 its reverse (124132441), we get a palindrome (268363862).

The spelling of 144231421 in words is "one hundred forty-four million, two hundred thirty-one thousand, four hundred twenty-one".