421602722 has 6 divisors (see below), whose sum is σ = 632447643. Its totient is φ = 210786842.

The previous prime is 421602691. The next prime is 421602773. The reversal of 421602722 is 227206124.

It can be written as a sum of positive squares in only one way, i.e., 210801361 + 210801361 = 14519^2 + 14519^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=14519.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421602691 and 421602700.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 21779 + ... + 36297.

Almost surely, 2^421602722 is an apocalyptic number.

421602722 is a deficient number, since it is larger than the sum of its proper divisors (210844921).

421602722 is an frugal number, since it uses more digits than its factorization.

421602722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29040 (or 14521 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 421602722 is about 20532.9667120950. The cubic root of 421602722 is about 749.8386153499.

Adding to 421602722 its reverse (227206124), we get a palindrome (648808846).

The spelling of 421602722 in words is "four hundred twenty-one million, six hundred two thousand, seven hundred twenty-two".