144642521 has 2 divisors, whose sum is σ = 144642522. Its totient is φ = 144642520.

The previous prime is 144642479. The next prime is 144642539. The reversal of 144642521 is 125246441.

144642521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 104142025 + 40500496 = 10205^2 + 6364^2 .

It is an emirp because it is prime and its reverse (125246441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 144642521 - 2⁶ = 144642457 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (144641521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72321260 + 72321261.

It is an arithmetic number, because the mean of its divisors is an integer number (72321261).

Almost surely, 2^144642521 is an apocalyptic number.

It is an amenable number.

144642521 is a deficient number, since it is larger than the sum of its proper divisors (1).

144642521 is an equidigital number, since it uses as much as digits as its factorization.

144642521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 29.

The square root of 144642521 is about 12026.7419112576. The cubic root of 144642521 is about 524.9266969462.

Adding to 144642521 its reverse (125246441), we get a palindrome (269888962).

The spelling of 144642521 in words is "one hundred forty-four million, six hundred forty-two thousand, five hundred twenty-one".