8421264 has 30 divisors (see below), whose sum is σ = 23568246. Its totient is φ = 2807040.

The previous prime is 8421251. The next prime is 8421403. The reversal of 8421264 is 4621248.

It can be written as a sum of positive squares in only one way, i.e., 8363664 + 57600 = 2892^2 + 240^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29097 + ... + 29384.

Almost surely, 2^8421264 is an apocalyptic number.

It is an amenable number.

8421264 is an abundant number, since it is smaller than the sum of its proper divisors (15146982).

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

8421264 is a wasteful number, since it uses less digits than its factorization.

8421264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58495 (or 58486 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 8421264 is about 2901.9414191193. The cubic root of 8421264 is about 203.4506558136.

The spelling of 8421264 in words is "eight million, four hundred twenty-one thousand, two hundred sixty-four".