420042011 has 2 divisors, whose sum is σ = 420042012. Its totient is φ = 420042010.

The previous prime is 420041989. The next prime is 420042023. The reversal of 420042011 is 110240024.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420042011 is a prime.

It is a super-3 number, since 3×420042011³ (a number of 27 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (420042211) 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, 210021005 + 210021006.

It is an arithmetic number, because the mean of its divisors is an integer number (210021006).

Almost surely, 2^420042011 is an apocalyptic number.

420042011 is a deficient number, since it is larger than the sum of its proper divisors (1).

420042011 is an equidigital number, since it uses as much as digits as its factorization.

420042011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 420042011 is about 20494.9264697388. The cubic root of 420042011 is about 748.9122073352.

Adding to 420042011 its reverse (110240024), we get a palindrome (530282035).

The spelling of 420042011 in words is "four hundred twenty million, forty-two thousand, eleven".