7121224 has 16 divisors (see below), whose sum is σ = 14566320. Its totient is φ = 3236880.

The previous prime is 7121209. The next prime is 7121263. The reversal of 7121224 is 4221217.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40374 + ... + 40549.

It is an arithmetic number, because the mean of its divisors is an integer number (910395).

Almost surely, 2^7121224 is an apocalyptic number.

It is an amenable number.

7121224 is an abundant number, since it is smaller than the sum of its proper divisors (7445096).

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

7121224 is a wasteful number, since it uses less digits than its factorization.

7121224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80940 (or 80936 counting only the distinct ones).

The product of its digits is 224, while the sum is 19.

The square root of 7121224 is about 2668.5621596658. The cubic root of 7121224 is about 192.3910577143.

It can be divided in two parts, 712 and 1224, that added together give a square (1936 = 44²).

The spelling of 7121224 in words is "seven million, one hundred twenty-one thousand, two hundred twenty-four".