420220061 has 2 divisors, whose sum is σ = 420220062. Its totient is φ = 420220060.

The previous prime is 420220049. The next prime is 420220079. The reversal of 420220061 is 160022024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 251064025 + 169156036 = 15845^2 + 13006^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420220061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420220001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210110030 + 210110031.

It is an arithmetic number, because the mean of its divisors is an integer number (210110031).

Almost surely, 2^420220061 is an apocalyptic number.

It is an amenable number.

420220061 is a deficient number, since it is larger than the sum of its proper divisors (1).

420220061 is an equidigital number, since it uses as much as digits as its factorization.

420220061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 420220061 is about 20499.2697674820. The cubic root of 420220061 is about 749.0180102300.

Adding to 420220061 its reverse (160022024), we get a palindrome (580242085).

The spelling of 420220061 in words is "four hundred twenty million, two hundred twenty thousand, sixty-one".