144332421 has 16 divisors (see below), whose sum is σ = 195706368. Its totient is φ = 94598000.

The previous prime is 144332413. The next prime is 144332443. The reversal of 144332421 is 124233441.

It is a cyclic number.

It is not a de Polignac number, because 144332421 - 2³ = 144332413 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 144332391 and 144332400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144332471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98746 + ... + 100196.

It is an arithmetic number, because the mean of its divisors is an integer number (12231648).

Almost surely, 2^144332421 is an apocalyptic number.

It is an amenable number.

144332421 is a deficient number, since it is larger than the sum of its proper divisors (51373947).

144332421 is a wasteful number, since it uses less digits than its factorization.

144332421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992.

The product of its digits is 2304, while the sum is 24.

The square root of 144332421 is about 12013.8428905992. The cubic root of 144332421 is about 524.5512973414.

Adding to 144332421 its reverse (124233441), we get a palindrome (268565862).

The spelling of 144332421 in words is "one hundred forty-four million, three hundred thirty-two thousand, four hundred twenty-one".