143254421 has 2 divisors, whose sum is σ = 143254422. Its totient is φ = 143254420.

The previous prime is 143254409. The next prime is 143254429. The reversal of 143254421 is 124452341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141943396 + 1311025 = 11914^2 + 1145^2 .

It is a cyclic number.

It is not a de Polignac number, because 143254421 - 2¹⁴ = 143238037 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143254429) 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, 71627210 + 71627211.

It is an arithmetic number, because the mean of its divisors is an integer number (71627211).

Almost surely, 2^143254421 is an apocalyptic number.

It is an amenable number.

143254421 is a deficient number, since it is larger than the sum of its proper divisors (1).

143254421 is an equidigital number, since it uses as much as digits as its factorization.

143254421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 26.

The square root of 143254421 is about 11968.8938920854. The cubic root of 143254421 is about 523.2420974557.

The spelling of 143254421 in words is "one hundred forty-three million, two hundred fifty-four thousand, four hundred twenty-one".