144235561 has 2 divisors, whose sum is σ = 144235562. Its totient is φ = 144235560.

The previous prime is 144235547. The next prime is 144235601. The reversal of 144235561 is 165532441.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131675625 + 12559936 = 11475^2 + 3544^2 .

It is a cyclic number.

It is not a de Polignac number, because 144235561 - 2¹⁷ = 144104489 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (144235961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72117780 + 72117781.

It is an arithmetic number, because the mean of its divisors is an integer number (72117781).

Almost surely, 2^144235561 is an apocalyptic number.

It is an amenable number.

144235561 is a deficient number, since it is larger than the sum of its proper divisors (1).

144235561 is an equidigital number, since it uses as much as digits as its factorization.

144235561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 31.

The square root of 144235561 is about 12009.8110309863. The cubic root of 144235561 is about 524.4339307601.

The spelling of 144235561 in words is "one hundred forty-four million, two hundred thirty-five thousand, five hundred sixty-one".