143421247 has 2 divisors, whose sum is σ = 143421248. Its totient is φ = 143421246.

The previous prime is 143421209. The next prime is 143421251. The reversal of 143421247 is 742124341.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 143421247 - 2⁷ = 143421119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143421277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71710623 + 71710624.

It is an arithmetic number, because the mean of its divisors is an integer number (71710624).

Almost surely, 2^143421247 is an apocalyptic number.

143421247 is a deficient number, since it is larger than the sum of its proper divisors (1).

143421247 is an equidigital number, since it uses as much as digits as its factorization.

143421247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 28.

The square root of 143421247 is about 11975.8610128875. The cubic root of 143421247 is about 523.4451313841.

Adding to 143421247 its reverse (742124341), we get a palindrome (885545588).

The spelling of 143421247 in words is "one hundred forty-three million, four hundred twenty-one thousand, two hundred forty-seven".