143420461 has 2 divisors, whose sum is σ = 143420462. Its totient is φ = 143420460.

The previous prime is 143420447. The next prime is 143420467. The reversal of 143420461 is 164024341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142922025 + 498436 = 11955^2 + 706^2 .

It is a cyclic number.

It is not a de Polignac number, because 143420461 - 2⁵ = 143420429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143420467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71710230 + 71710231.

It is an arithmetic number, because the mean of its divisors is an integer number (71710231).

Almost surely, 2^143420461 is an apocalyptic number.

It is an amenable number.

143420461 is a deficient number, since it is larger than the sum of its proper divisors (1).

143420461 is an equidigital number, since it uses as much as digits as its factorization.

143420461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 143420461 is about 11975.8281968305. The cubic root of 143420461 is about 523.4441751598. Note that the first 3 decimals are identical.

The spelling of 143420461 in words is "one hundred forty-three million, four hundred twenty thousand, four hundred sixty-one".