4221672 has 64 divisors (see below), whose sum is σ = 12996480. Its totient is φ = 1112832.

The previous prime is 4221671. The next prime is 4221677. The reversal of 4221672 is 2761224.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (4221671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1218 + ... + 3150.

It is an arithmetic number, because the mean of its divisors is an integer number (203070).

Almost surely, 2^4221672 is an apocalyptic number.

4221672 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4221672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6498240).

4221672 is an abundant number, since it is smaller than the sum of its proper divisors (8774808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4221672 is a wasteful number, since it uses less digits than its factorization.

4221672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1962 (or 1958 counting only the distinct ones).

The product of its digits is 1344, while the sum is 24.

The square root of 4221672 is about 2054.6707765479. The cubic root of 4221672 is about 161.6198983765.

Adding to 4221672 its reverse (2761224), we get a palindrome (6982896).

It can be divided in two parts, 4 and 221672, that multiplied together give a palindrome (886688).

The spelling of 4221672 in words is "four million, two hundred twenty-one thousand, six hundred seventy-two".