144401421 has 4 divisors (see below), whose sum is σ = 192535232. Its totient is φ = 96267612.

The previous prime is 144401381. The next prime is 144401443. The reversal of 144401421 is 124104441.

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, and also an emirpimes, since its reverse is a distinct semiprime: 124104441 = 3 ⋅41368147.

It is not a de Polignac number, because 144401421 - 2⁷ = 144401293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144401021) 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, 24066901 + ... + 24066906.

It is an arithmetic number, because the mean of its divisors is an integer number (48133808).

Almost surely, 2^144401421 is an apocalyptic number.

It is an amenable number.

144401421 is a deficient number, since it is larger than the sum of its proper divisors (48133811).

144401421 is an equidigital number, since it uses as much as digits as its factorization.

144401421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48133810.

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 144401421 is about 12016.7142347648. The cubic root of 144401421 is about 524.6348735588.

Adding to 144401421 its reverse (124104441), we get a palindrome (268505862).

The spelling of 144401421 in words is "one hundred forty-four million, four hundred one thousand, four hundred twenty-one".