144681445 has 8 divisors (see below), whose sum is σ = 174578040. Its totient is φ = 115104960.

The previous prime is 144681437. The next prime is 144681479. The reversal of 144681445 is 544186441.

144681445 = 443² + 444² + ... + 804².

It can be written as a sum of positive squares in 4 ways, for example, as 6806881 + 137874564 = 2609^2 + 11742^2 .

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

It is not a de Polignac number, because 144681445 - 2³ = 144681437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79030 + ... + 80839.

It is an arithmetic number, because the mean of its divisors is an integer number (21822255).

Almost surely, 2^144681445 is an apocalyptic number.

It is an amenable number.

144681445 is a deficient number, since it is larger than the sum of its proper divisors (29896595).

144681445 is a wasteful number, since it uses less digits than its factorization.

144681445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160055.

The product of its digits is 61440, while the sum is 37.

The square root of 144681445 is about 12028.3600295302. The cubic root of 144681445 is about 524.9737794917.

The spelling of 144681445 in words is "one hundred forty-four million, six hundred eighty-one thousand, four hundred forty-five".