1290143 has 2 divisors, whose sum is σ = 1290144. Its totient is φ = 1290142.

The previous prime is 1290131. The next prime is 1290151. The reversal of 1290143 is 3410921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1290143 - 2²⁰ = 241567 is a prime.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1290173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 645071 + 645072.

It is an arithmetic number, because the mean of its divisors is an integer number (645072).

2^1290143 is an apocalyptic number.

1290143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1290143 is an equidigital number, since it uses as much as digits as its factorization.

1290143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1290143 is about 1135.8446196553. The cubic root of 1290143 is about 108.8627456249.

The spelling of 1290143 in words is "one million, two hundred ninety thousand, one hundred forty-three".