143421277 has 2 divisors, whose sum is σ = 143421278. Its totient is φ = 143421276.

The previous prime is 143421263. The next prime is 143421293. The reversal of 143421277 is 772124341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76492516 + 66928761 = 8746^2 + 8181^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-143421277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143421247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71710638 + 71710639.

It is an arithmetic number, because the mean of its divisors is an integer number (71710639).

Almost surely, 2^143421277 is an apocalyptic number.

It is an amenable number.

143421277 is a deficient number, since it is larger than the sum of its proper divisors (1).

143421277 is an equidigital number, since it uses as much as digits as its factorization.

143421277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9408, while the sum is 31.

The square root of 143421277 is about 11975.8622654070. The cubic root of 143421277 is about 523.4451678811.

The spelling of 143421277 in words is "one hundred forty-three million, four hundred twenty-one thousand, two hundred seventy-seven".