421772 has 12 divisors (see below), whose sum is σ = 794976. Its totient is φ = 194640.

The previous prime is 421741. The next prime is 421783. The reversal of 421772 is 277124.

Added to its reverse (277124) it gives a square (698896 = 836²).

421772 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 4004 + ... + 4107.

It is an arithmetic number, because the mean of its divisors is an integer number (66248).

2⁴²¹⁷⁷² is an apocalyptic number.

It is an amenable number.

421772 is a deficient number, since it is larger than the sum of its proper divisors (373204).

421772 is a wasteful number, since it uses less digits than its factorization.

421772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8128 (or 8126 counting only the distinct ones).

The product of its digits is 784, while the sum is 23.

The square root of 421772 is about 649.4397585612. The cubic root of 421772 is about 74.9938957995.

Adding to 421772 its reverse (277124), we get a palindrome (698896).

The spelling of 421772 in words is "four hundred twenty-one thousand, seven hundred seventy-two", and thus it is an iban number.