421020264 has 32 divisors (see below), whose sum is σ = 1202915520. Its totient is φ = 120291456.

The previous prime is 421020263. The next prime is 421020307. The reversal of 421020264 is 462020124.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 421020264.

It is not an unprimeable number, because it can be changed into a prime (421020263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1252869 + ... + 1253204.

It is an arithmetic number, because the mean of its divisors is an integer number (37591110).

Almost surely, 2^421020264 is an apocalyptic number.

It is an amenable number.

421020264 is an abundant number, since it is smaller than the sum of its proper divisors (781895256).

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

421020264 is a wasteful number, since it uses less digits than its factorization.

421020264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2506089 (or 2506085 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 421020264 is about 20518.7783262065. The cubic root of 421020264 is about 749.4931473221.

Adding to 421020264 its reverse (462020124), we get a palindrome (883040388).

It can be divided in two parts, 42 and 1020264, that added together give a triangular number (1020306 = T₁₄₂₈).

The spelling of 421020264 in words is "four hundred twenty-one million, twenty thousand, two hundred sixty-four".