143264021 has 2 divisors, whose sum is σ = 143264022. Its totient is φ = 143264020.

The previous prime is 143263997. The next prime is 143264027. The reversal of 143264021 is 120462341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77880625 + 65383396 = 8825^2 + 8086^2 .

It is an emirp because it is prime and its reverse (120462341) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 143264021 - 2¹⁸ = 143001877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (143264027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71632010 + 71632011.

It is an arithmetic number, because the mean of its divisors is an integer number (71632011).

Almost surely, 2^143264021 is an apocalyptic number.

It is an amenable number.

143264021 is a deficient number, since it is larger than the sum of its proper divisors (1).

143264021 is an equidigital number, since it uses as much as digits as its factorization.

143264021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 143264021 is about 11969.2949249319. The cubic root of 143264021 is about 523.2537853136.

The spelling of 143264021 in words is "one hundred forty-three million, two hundred sixty-four thousand, twenty-one".