144394501 has 4 divisors (see below), whose sum is σ = 144859104. Its totient is φ = 143929900.

The previous prime is 144394493. The next prime is 144394517. The reversal of 144394501 is 105493441.

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: 105493441 = 10271².

It is a cyclic number.

It is not a de Polignac number, because 144394501 - 2³ = 144394493 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144394531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231835 + ... + 232456.

It is an arithmetic number, because the mean of its divisors is an integer number (36214776).

Almost surely, 2^144394501 is an apocalyptic number.

It is an amenable number.

144394501 is a deficient number, since it is larger than the sum of its proper divisors (464603).

144394501 is an equidigital number, since it uses as much as digits as its factorization.

144394501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464602.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 144394501 is about 12016.4262990292. The cubic root of 144394501 is about 524.6264929133.

The spelling of 144394501 in words is "one hundred forty-four million, three hundred ninety-four thousand, five hundred one".