143456641 has 2 divisors, whose sum is σ = 143456642. Its totient is φ = 143456640.

The previous prime is 143456639. The next prime is 143456647. The reversal of 143456641 is 146654341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106502400 + 36954241 = 10320^2 + 6079^2 .

It is an emirp because it is prime and its reverse (146654341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 143456641 - 2¹ = 143456639 is a prime.

Together with 143456639, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 143456597 and 143456606.

It is not a weakly prime, because it can be changed into another prime (143456647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71728320 + 71728321.

It is an arithmetic number, because the mean of its divisors is an integer number (71728321).

Almost surely, 2^143456641 is an apocalyptic number.

It is an amenable number.

143456641 is a deficient number, since it is larger than the sum of its proper divisors (1).

143456641 is an equidigital number, since it uses as much as digits as its factorization.

143456641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 34.

The square root of 143456641 is about 11977.3386442899. The cubic root of 143456641 is about 523.4881870529.

The spelling of 143456641 in words is "one hundred forty-three million, four hundred fifty-six thousand, six hundred forty-one".