420025253 has 2 divisors, whose sum is σ = 420025254. Its totient is φ = 420025252.

The previous prime is 420025237. The next prime is 420025289. The reversal of 420025253 is 352520024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 363970084 + 56055169 = 19078^2 + 7487^2 .

It is a cyclic number.

It is not a de Polignac number, because 420025253 - 2⁴ = 420025237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420025223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210012626 + 210012627.

It is an arithmetic number, because the mean of its divisors is an integer number (210012627).

Almost surely, 2^420025253 is an apocalyptic number.

It is an amenable number.

420025253 is a deficient number, since it is larger than the sum of its proper divisors (1).

420025253 is an equidigital number, since it uses as much as digits as its factorization.

420025253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 420025253 is about 20494.5176327719. The cubic root of 420025253 is about 748.9022476666.

Adding to 420025253 its reverse (352520024), we get a palindrome (772545277).

The spelling of 420025253 in words is "four hundred twenty million, twenty-five thousand, two hundred fifty-three".