144547621 has 2 divisors, whose sum is σ = 144547622. Its totient is φ = 144547620.

The previous prime is 144547603. The next prime is 144547633. The reversal of 144547621 is 126745441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96314596 + 48233025 = 9814^2 + 6945^2 .

It is a cyclic number.

It is not a de Polignac number, because 144547621 - 2¹¹ = 144545573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (144547021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72273810 + 72273811.

It is an arithmetic number, because the mean of its divisors is an integer number (72273811).

Almost surely, 2^144547621 is an apocalyptic number.

It is an amenable number.

144547621 is a deficient number, since it is larger than the sum of its proper divisors (1).

144547621 is an equidigital number, since it uses as much as digits as its factorization.

144547621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 34.

The square root of 144547621 is about 12022.7958894760. The cubic root of 144547621 is about 524.8118703105.

The spelling of 144547621 in words is "one hundred forty-four million, five hundred forty-seven thousand, six hundred twenty-one".