421564753 has 12 divisors (see below), whose sum is σ = 437019300. Its totient is φ = 406640640.

The previous prime is 421564751. The next prime is 421564757. The reversal of 421564753 is 357465124.

It can be written as a sum of positive squares in 2 ways, for example, as 336795904 + 84768849 = 18352^2 + 9207^2 .

It is not a de Polignac number, because 421564753 - 2¹ = 421564751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421564751) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 431001 + ... + 431977.

It is an arithmetic number, because the mean of its divisors is an integer number (36418275).

Almost surely, 2^421564753 is an apocalyptic number.

It is an amenable number.

421564753 is a deficient number, since it is larger than the sum of its proper divisors (15454547).

421564753 is an equidigital number, since it uses as much as digits as its factorization.

421564753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1488 (or 1457 counting only the distinct ones).

The product of its digits is 100800, while the sum is 37.

The square root of 421564753 is about 20532.0421049636. The cubic root of 421564753 is about 749.8161048397.

The spelling of 421564753 in words is "four hundred twenty-one million, five hundred sixty-four thousand, seven hundred fifty-three".