420073 has 2 divisors, whose sum is σ = 420074. Its totient is φ = 420072.

The previous prime is 420047. The next prime is 420097. The reversal of 420073 is 370024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 419904 + 169 = 648^2 + 13^2 .

It is a cyclic number.

It is not a de Polignac number, because 420073 - 2⁵ = 420041 is a prime.

It is a super-2 number, since 2×420073² = 352922650658, which contains 22 as substring.

420073 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (426073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210036 + 210037.

It is an arithmetic number, because the mean of its divisors is an integer number (210037).

2⁴²⁰⁰⁷³ is an apocalyptic number.

It is an amenable number.

420073 is a deficient number, since it is larger than the sum of its proper divisors (1).

420073 is an equidigital number, since it uses as much as digits as its factorization.

420073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 420073 is about 648.1303881165. The cubic root of 420073 is about 74.8930624120.

Adding to 420073 its reverse (370024), we get a palindrome (790097).

The spelling of 420073 in words is "four hundred twenty thousand, seventy-three", and thus it is an iban number.