144458381 has 4 divisors (see below), whose sum is σ = 145888764. Its totient is φ = 143028000.

The previous prime is 144458341. The next prime is 144458383. The reversal of 144458381 is 183854441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 183854441 = 101 ⋅1820341.

It can be written as a sum of positive squares in 2 ways, for example, as 127893481 + 16564900 = 11309^2 + 4070^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144458381 is a prime.

It is a super-2 number, since 2×144458381² = 41736447682282322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144458383) 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, 715040 + ... + 715241.

It is an arithmetic number, because the mean of its divisors is an integer number (36472191).

Almost surely, 2^144458381 is an apocalyptic number.

It is an amenable number.

144458381 is a deficient number, since it is larger than the sum of its proper divisors (1430383).

144458381 is a wasteful number, since it uses less digits than its factorization.

144458381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430382.

The product of its digits is 61440, while the sum is 38.

The square root of 144458381 is about 12019.0840333197. The cubic root of 144458381 is about 524.7038462735.

The spelling of 144458381 in words is "one hundred forty-four million, four hundred fifty-eight thousand, three hundred eighty-one".