420045161 has 2 divisors, whose sum is σ = 420045162. Its totient is φ = 420045160.

The previous prime is 420045149. The next prime is 420045167. The reversal of 420045161 is 161540024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 417957136 + 2088025 = 20444^2 + 1445^2 .

It is a cyclic number.

It is not a de Polignac number, because 420045161 - 2⁶ = 420045097 is a prime.

It is not a weakly prime, because it can be changed into another prime (420045167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210022580 + 210022581.

It is an arithmetic number, because the mean of its divisors is an integer number (210022581).

Almost surely, 2^420045161 is an apocalyptic number.

It is an amenable number.

420045161 is a deficient number, since it is larger than the sum of its proper divisors (1).

420045161 is an equidigital number, since it uses as much as digits as its factorization.

420045161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 420045161 is about 20495.0033178821. The cubic root of 420045161 is about 748.9140794238.

Adding to 420045161 its reverse (161540024), we get a palindrome (581585185).

The spelling of 420045161 in words is "four hundred twenty million, forty-five thousand, one hundred sixty-one".