144001439 has 4 divisors (see below), whose sum is σ = 144030600. Its totient is φ = 143972280.

The previous prime is 144001433. The next prime is 144001463. The reversal of 144001439 is 934100441.

144001439 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, and also an emirpimes, since its reverse is a distinct semiprime: 934100441 = 3863 ⋅241807.

It is a cyclic number.

It is not a de Polignac number, because 144001439 - 2⁴ = 144001423 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 (144001433) 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, 5132 + ... + 17729.

It is an arithmetic number, because the mean of its divisors is an integer number (36007650).

Almost surely, 2^144001439 is an apocalyptic number.

144001439 is a deficient number, since it is larger than the sum of its proper divisors (29161).

144001439 is an equidigital number, since it uses as much as digits as its factorization.

144001439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29160.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 144001439 is about 12000.0599581835. The cubic root of 144001439 is about 524.1500247836.

The spelling of 144001439 in words is "one hundred forty-four million, one thousand, four hundred thirty-nine".