421832645 has 16 divisors (see below), whose sum is σ = 577206000. Its totient is φ = 293182464.

The previous prime is 421832633. The next prime is 421832651. The reversal of 421832645 is 546238124.

It can be written as a sum of positive squares in 8 ways, for example, as 86136961 + 335695684 = 9281^2 + 18322^2 .

It is a cyclic number.

It is not a de Polignac number, because 421832645 - 2¹⁴ = 421816261 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189770 + ... + 191979.

It is an arithmetic number, because the mean of its divisors is an integer number (36075375).

Almost surely, 2^421832645 is an apocalyptic number.

It is an amenable number.

421832645 is a deficient number, since it is larger than the sum of its proper divisors (155373355).

421832645 is a wasteful number, since it uses less digits than its factorization.

421832645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381784.

The product of its digits is 46080, while the sum is 35.

The square root of 421832645 is about 20538.5648232782. The cubic root of 421832645 is about 749.9748999007.

It can be divided in two parts, 4218 and 32645, that added together give a palindrome (36863).

The spelling of 421832645 in words is "four hundred twenty-one million, eight hundred thirty-two thousand, six hundred forty-five".