144673581 has 16 divisors (see below), whose sum is σ = 218671040. Its totient is φ = 84343680.

The previous prime is 144673513. The next prime is 144673583. The reversal of 144673581 is 185376441.

It is not a de Polignac number, because 144673581 - 2⁷ = 144673453 is a prime.

It is a super-2 number, since 2×144673581² = 41860890078727122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144673583) 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, 96880 + ... + 98361.

It is an arithmetic number, because the mean of its divisors is an integer number (13666940).

Almost surely, 2^144673581 is an apocalyptic number.

It is an amenable number.

144673581 is a deficient number, since it is larger than the sum of its proper divisors (73997459).

144673581 is a wasteful number, since it uses less digits than its factorization.

144673581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195276.

The product of its digits is 80640, while the sum is 39.

The square root of 144673581 is about 12028.0331309820. The cubic root of 144673581 is about 524.9642678629.

The spelling of 144673581 in words is "one hundred forty-four million, six hundred seventy-three thousand, five hundred eighty-one".