7218572 has 6 divisors (see below), whose sum is σ = 12632508. Its totient is φ = 3609284.

The previous prime is 7218569. The next prime is 7218577. The reversal of 7218572 is 2758127.

It is not an unprimeable number, because it can be changed into a prime (7218577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 902318 + ... + 902325.

It is an arithmetic number, because the mean of its divisors is an integer number (2105418).

Almost surely, 2^7218572 is an apocalyptic number.

It is an amenable number.

7218572 is a deficient number, since it is larger than the sum of its proper divisors (5413936).

7218572 is a wasteful number, since it uses less digits than its factorization.

7218572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1804647 (or 1804645 counting only the distinct ones).

The product of its digits is 7840, while the sum is 32.

The square root of 7218572 is about 2686.7400320835. The cubic root of 7218572 is about 193.2637627869.

The spelling of 7218572 in words is "seven million, two hundred eighteen thousand, five hundred seventy-two".