420500253 has 16 divisors (see below), whose sum is σ = 594245376. Its totient is φ = 263577600.

The previous prime is 420500239. The next prime is 420500299. The reversal of 420500253 is 352005024.

It is not a de Polignac number, because 420500253 - 2⁶ = 420500189 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420500653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55228 + ... + 62378.

It is an arithmetic number, because the mean of its divisors is an integer number (37140336).

Almost surely, 2^420500253 is an apocalyptic number.

It is an amenable number.

420500253 is a deficient number, since it is larger than the sum of its proper divisors (173745123).

420500253 is a wasteful number, since it uses less digits than its factorization.

420500253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8324.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 420500253 is about 20506.1028233060. The cubic root of 420500253 is about 749.1844486004.

Adding to 420500253 its reverse (352005024), we get a palindrome (772505277).

The spelling of 420500253 in words is "four hundred twenty million, five hundred thousand, two hundred fifty-three".