4221270 has 96 divisors (see below), whose sum is σ = 12130560. Its totient is φ = 1013760.

The previous prime is 4221263. The next prime is 4221271. The reversal of 4221270 is 721224.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221271) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 47386 + ... + 47474.

It is an arithmetic number, because the mean of its divisors is an integer number (126360).

Almost surely, 2^4221270 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4221270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6065280).

4221270 is an abundant number, since it is smaller than the sum of its proper divisors (7909290).

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

4221270 is a wasteful number, since it uses less digits than its factorization.

4221270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 4221270 is about 2054.5729483277. The cubic root of 4221270 is about 161.6147682399.

Adding to 4221270 its reverse (721224), we get a palindrome (4942494).

It can be divided in two parts, 42 and 21270, that added together give a palindrome (21312).

The spelling of 4221270 in words is "four million, two hundred twenty-one thousand, two hundred seventy".