420503265 has 96 divisors (see below), whose sum is σ = 925482240. Its totient is φ = 177375744.

The previous prime is 420503263. The next prime is 420503267. The reversal of 420503265 is 562305024.

It is an interprime number because it is at equal distance from previous prime (420503263) and next prime (420503267).

It is not a de Polignac number, because 420503265 - 2¹ = 420503263 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (420503263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 158389 + ... + 161021.

It is an arithmetic number, because the mean of its divisors is an integer number (9640440).

Almost surely, 2^420503265 is an apocalyptic number.

420503265 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

420503265 is an abundant number, since it is smaller than the sum of its proper divisors (504978975).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

420503265 is a wasteful number, since it uses less digits than its factorization.

420503265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2680 (or 2661 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 420503265 is about 20506.1762647257. The cubic root of 420503265 is about 749.1862373732.

Adding to 420503265 its reverse (562305024), we get a palindrome (982808289).

The spelling of 420503265 in words is "four hundred twenty million, five hundred three thousand, two hundred sixty-five".