144839521 has 2 divisors, whose sum is σ = 144839522. Its totient is φ = 144839520.

The previous prime is 144839479. The next prime is 144839531. The reversal of 144839521 is 125938441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97298496 + 47541025 = 9864^2 + 6895^2 .

It is a cyclic number.

It is not a de Polignac number, because 144839521 - 2¹⁷ = 144708449 is a prime.

It is not a weakly prime, because it can be changed into another prime (144839531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72419760 + 72419761.

It is an arithmetic number, because the mean of its divisors is an integer number (72419761).

Almost surely, 2^144839521 is an apocalyptic number.

It is an amenable number.

144839521 is a deficient number, since it is larger than the sum of its proper divisors (1).

144839521 is an equidigital number, since it uses as much as digits as its factorization.

144839521 is an evil number, because the sum of its binary digits is even.

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

The square root of 144839521 is about 12034.9292062729. The cubic root of 144839521 is about 525.1649017895.

The spelling of 144839521 in words is "one hundred forty-four million, eight hundred thirty-nine thousand, five hundred twenty-one".