144322421 has 4 divisors (see below), whose sum is σ = 144506592. Its totient is φ = 144138252.

The previous prime is 144322393. The next prime is 144322427. The reversal of 144322421 is 124223441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 144322421 - 2¹⁴ = 144306037 is a prime.

It is a super-2 number, since 2×144322421² = 41657922406602482, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144322427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90905 + ... + 92478.

It is an arithmetic number, because the mean of its divisors is an integer number (36126648).

Almost surely, 2^144322421 is an apocalyptic number.

It is an amenable number.

144322421 is a deficient number, since it is larger than the sum of its proper divisors (184171).

144322421 is an equidigital number, since it uses as much as digits as its factorization.

144322421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184170.

The product of its digits is 1536, while the sum is 23.

The square root of 144322421 is about 12013.4266968255. The cubic root of 144322421 is about 524.5391826364.

Adding to 144322421 its reverse (124223441), we get a palindrome (268545862).

The spelling of 144322421 in words is "one hundred forty-four million, three hundred twenty-two thousand, four hundred twenty-one".