420253 has 2 divisors, whose sum is σ = 420254. Its totient is φ = 420252.

The previous prime is 420241. The next prime is 420263. The reversal of 420253 is 352024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 363609 + 56644 = 603^2 + 238^2 .

It is a cyclic number.

It is not a de Polignac number, because 420253 - 2⁵ = 420221 is a prime.

It is a super-2 number, since 2×420253² = 353225168018, which contains 22 as substring.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210126 + 210127.

It is an arithmetic number, because the mean of its divisors is an integer number (210127).

2⁴²⁰²⁵³ is an apocalyptic number.

It is an amenable number.

420253 is a deficient number, since it is larger than the sum of its proper divisors (1).

420253 is an equidigital number, since it uses as much as digits as its factorization.

420253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 420253 is about 648.2692341921. The cubic root of 420253 is about 74.9037580341.

Adding to 420253 its reverse (352024), we get a palindrome (772277).

The spelling of 420253 in words is "four hundred twenty thousand, two hundred fifty-three".