7220124 has 24 divisors (see below), whose sum is σ = 18719120. Its totient is φ = 2406672.

The previous prime is 7220123. The next prime is 7220131. The reversal of 7220124 is 4210227.

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

It is a junction number, because it is equal to n+sod(n) for n = 7220097 and 7220106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7220123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33319 + ... + 33534.

Almost surely, 2^7220124 is an apocalyptic number.

It is an amenable number.

7220124 is an abundant number, since it is smaller than the sum of its proper divisors (11498996).

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

7220124 is a wasteful number, since it uses less digits than its factorization.

7220124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66866 (or 66858 counting only the distinct ones).

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

The square root of 7220124 is about 2687.0288424206. The cubic root of 7220124 is about 193.2776124267.

The spelling of 7220124 in words is "seven million, two hundred twenty thousand, one hundred twenty-four".