7212144 has 40 divisors (see below), whose sum is σ = 18835600. Its totient is φ = 2377728.

The previous prime is 7212083. The next prime is 7212157. The reversal of 7212144 is 4412127.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 7212144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3882 + ... + 5430.

It is an arithmetic number, because the mean of its divisors is an integer number (470890).

Almost surely, 2^7212144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7212144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9417800).

7212144 is an abundant number, since it is smaller than the sum of its proper divisors (11623456).

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

7212144 is a wasteful number, since it uses less digits than its factorization.

7212144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1657 (or 1651 counting only the distinct ones).

The product of its digits is 448, while the sum is 21.

The square root of 7212144 is about 2685.5435204070. The cubic root of 7212144 is about 193.2063798587.

The spelling of 7212144 in words is "seven million, two hundred twelve thousand, one hundred forty-four".