143561441 has 2 divisors, whose sum is σ = 143561442. Its totient is φ = 143561440.

The previous prime is 143561387. The next prime is 143561461. The reversal of 143561441 is 144165341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 143041600 + 519841 = 11960^2 + 721^2 .

It is a cyclic number.

It is not a de Polignac number, because 143561441 - 2¹⁸ = 143299297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (143561461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71780720 + 71780721.

It is an arithmetic number, because the mean of its divisors is an integer number (71780721).

Almost surely, 2^143561441 is an apocalyptic number.

It is an amenable number.

143561441 is a deficient number, since it is larger than the sum of its proper divisors (1).

143561441 is an equidigital number, since it uses as much as digits as its factorization.

143561441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 29.

The square root of 143561441 is about 11981.7127740570. The cubic root of 143561441 is about 523.6156313865.

The spelling of 143561441 in words is "one hundred forty-three million, five hundred sixty-one thousand, four hundred forty-one".