144392581 has 8 divisors (see below), whose sum is σ = 147939264. Its totient is φ = 140854560.

The previous prime is 144392561. The next prime is 144392587. The reversal of 144392581 is 185293441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 144392581 - 2¹⁹ = 143868293 is a prime.

It is a super-2 number, since 2×144392581² = 41698434895683122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 144392581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144392587) 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 7 ways as a sum of consecutive naturals, for example, 42705 + ... + 45961.

It is an arithmetic number, because the mean of its divisors is an integer number (18492408).

Almost surely, 2^144392581 is an apocalyptic number.

It is an amenable number.

144392581 is a deficient number, since it is larger than the sum of its proper divisors (3546683).

144392581 is a wasteful number, since it uses less digits than its factorization.

144392581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4331.

The product of its digits is 34560, while the sum is 37.

The square root of 144392581 is about 12016.3464081226. The cubic root of 144392581 is about 524.6241676001.

It can be divided in two parts, 14439 and 2581, that added together give a triangular number (17020 = T₁₈₄).

The spelling of 144392581 in words is "one hundred forty-four million, three hundred ninety-two thousand, five hundred eighty-one".