144421539 has 4 divisors (see below), whose sum is σ = 192562056. Its totient is φ = 96281024.

The previous prime is 144421523. The next prime is 144421547. The reversal of 144421539 is 935124441.

144421539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 144421539 - 2⁴ = 144421523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (144421939) 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, 24070254 + ... + 24070259.

It is an arithmetic number, because the mean of its divisors is an integer number (48140514).

Almost surely, 2^144421539 is an apocalyptic number.

144421539 is a deficient number, since it is larger than the sum of its proper divisors (48140517).

144421539 is an equidigital number, since it uses as much as digits as its factorization.

144421539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48140516.

The product of its digits is 17280, while the sum is 33.

The square root of 144421539 is about 12017.5512896763. The cubic root of 144421539 is about 524.6592364637.

The spelling of 144421539 in words is "one hundred forty-four million, four hundred twenty-one thousand, five hundred thirty-nine".