144774481 has 6 divisors (see below), whose sum is σ = 145694850. Its totient is φ = 143859888.

The previous prime is 144774473. The next prime is 144774503. The reversal of 144774481 is 184477441.

It can be written as a sum of positive squares in only one way, i.e., 95648400 + 49126081 = 9780^2 + 7009^2 .

It is not a de Polignac number, because 144774481 - 2³ = 144774473 is a prime.

It is a super-2 number, since 2×144774481² = 41919300697638722, 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 (144774181) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23845 + ... + 29293.

It is an arithmetic number, because the mean of its divisors is an integer number (24282475).

Almost surely, 2^144774481 is an apocalyptic number.

It is an amenable number.

144774481 is a deficient number, since it is larger than the sum of its proper divisors (920369).

144774481 is an frugal number, since it uses more digits than its factorization.

144774481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5775 (or 5612 counting only the distinct ones).

The product of its digits is 100352, while the sum is 40.

The square root of 144774481 is about 12032.2267681423. The cubic root of 144774481 is about 525.0862818131.

The spelling of 144774481 in words is "one hundred forty-four million, seven hundred seventy-four thousand, four hundred eighty-one".