144078581 has 2 divisors, whose sum is σ = 144078582. Its totient is φ = 144078580.

The previous prime is 144078533. The next prime is 144078593. The reversal of 144078581 is 185870441.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143017681 + 1060900 = 11959^2 + 1030^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144078581 is a prime.

It is a super-2 number, since 2×144078581² = 41517275005947122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144068581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72039290 + 72039291.

It is an arithmetic number, because the mean of its divisors is an integer number (72039291).

Almost surely, 2^144078581 is an apocalyptic number.

It is an amenable number.

144078581 is a deficient number, since it is larger than the sum of its proper divisors (1).

144078581 is an equidigital number, since it uses as much as digits as its factorization.

144078581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35840, while the sum is 38.

The square root of 144078581 is about 12003.2737617702. The cubic root of 144078581 is about 524.2436043187.

The spelling of 144078581 in words is "one hundred forty-four million, seventy-eight thousand, five hundred eighty-one".