144636521 has 2 divisors, whose sum is σ = 144636522. Its totient is φ = 144636520.

The previous prime is 144636473. The next prime is 144636533. The reversal of 144636521 is 125636441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131423296 + 13213225 = 11464^2 + 3635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144636521 is a prime.

It is not a weakly prime, because it can be changed into another prime (144636571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72318260 + 72318261.

It is an arithmetic number, because the mean of its divisors is an integer number (72318261).

Almost surely, 2^144636521 is an apocalyptic number.

It is an amenable number.

144636521 is a deficient number, since it is larger than the sum of its proper divisors (1).

144636521 is an equidigital number, since it uses as much as digits as its factorization.

144636521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 32.

The square root of 144636521 is about 12026.4924645551. The cubic root of 144636521 is about 524.9194385833.

The spelling of 144636521 in words is "one hundred forty-four million, six hundred thirty-six thousand, five hundred twenty-one".