143420971 has 2 divisors, whose sum is σ = 143420972. Its totient is φ = 143420970.

The previous prime is 143420941. The next prime is 143421007. The reversal of 143420971 is 179024341.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 143420971 - 2²⁵ = 109866539 is a prime.

It is not a weakly prime, because it can be changed into another prime (143420941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71710485 + 71710486.

It is an arithmetic number, because the mean of its divisors is an integer number (71710486).

Almost surely, 2^143420971 is an apocalyptic number.

143420971 is a deficient number, since it is larger than the sum of its proper divisors (1).

143420971 is an equidigital number, since it uses as much as digits as its factorization.

143420971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 143420971 is about 11975.8494897022. The cubic root of 143420971 is about 523.4447956111. Note that the first 3 decimals are identical.

The spelling of 143420971 in words is "one hundred forty-three million, four hundred twenty thousand, nine hundred seventy-one".