421506772 has 24 divisors (see below), whose sum is σ = 782419176. Its totient is φ = 198002688.

The previous prime is 421506751. The next prime is 421506817. The reversal of 421506772 is 277605124.

It can be written as a sum of positive squares in 4 ways, for example, as 267845956 + 153660816 = 16366^2 + 12396^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35098 + ... + 45550.

It is an arithmetic number, because the mean of its divisors is an integer number (32600799).

Almost surely, 2^421506772 is an apocalyptic number.

It is an amenable number.

421506772 is a deficient number, since it is larger than the sum of its proper divisors (360912404).

421506772 is a wasteful number, since it uses less digits than its factorization.

421506772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11067 (or 11065 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 421506772 is about 20530.6300926201. The cubic root of 421506772 is about 749.7817272970.

The spelling of 421506772 in words is "four hundred twenty-one million, five hundred six thousand, seven hundred seventy-two".