420142433 has 2 divisors, whose sum is σ = 420142434. Its totient is φ = 420142432.

The previous prime is 420142417. The next prime is 420142451. The reversal of 420142433 is 334241024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 418939024 + 1203409 = 20468^2 + 1097^2 .

It is a cyclic number.

It is not a de Polignac number, because 420142433 - 2⁴ = 420142417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420142399 and 420142408.

It is not a weakly prime, because it can be changed into another prime (420144433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210071216 + 210071217.

It is an arithmetic number, because the mean of its divisors is an integer number (210071217).

Almost surely, 2^420142433 is an apocalyptic number.

It is an amenable number.

420142433 is a deficient number, since it is larger than the sum of its proper divisors (1).

420142433 is an equidigital number, since it uses as much as digits as its factorization.

420142433 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 23.

The square root of 420142433 is about 20497.3762467297. The cubic root of 420142433 is about 748.9718849128.

Adding to 420142433 its reverse (334241024), we get a palindrome (754383457).

The spelling of 420142433 in words is "four hundred twenty million, one hundred forty-two thousand, four hundred thirty-three".