144335021 has 4 divisors (see below), whose sum is σ = 144389952. Its totient is φ = 144280092.

The previous prime is 144335017. The next prime is 144335027. The reversal of 144335021 is 120533441.

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: 120533441 = 7 ⋅17219063.

It is a cyclic number.

It is not a de Polignac number, because 144335021 - 2² = 144335017 is a prime.

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 (144335027) 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, 23315 + ... + 28848.

It is an arithmetic number, because the mean of its divisors is an integer number (36097488).

Almost surely, 2^144335021 is an apocalyptic number.

It is an amenable number.

144335021 is a deficient number, since it is larger than the sum of its proper divisors (54931).

144335021 is an equidigital number, since it uses as much as digits as its factorization.

144335021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54930.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 144335021 is about 12013.9510986186. The cubic root of 144335021 is about 524.5544470730.

Adding to 144335021 its reverse (120533441), we get a palindrome (264868462).

The spelling of 144335021 in words is "one hundred forty-four million, three hundred thirty-five thousand, twenty-one".