7218485 has 4 divisors (see below), whose sum is σ = 8662188. Its totient is φ = 5774784.

The previous prime is 7218479. The next prime is 7218503. The reversal of 7218485 is 5848127.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5597956 + 1620529 = 2366^2 + 1273^2 .

It is a cyclic number.

It is not a de Polignac number, because 7218485 - 2⁴ = 7218469 is a prime.

It is a Duffinian number.

It is a congruent 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, 721844 + ... + 721853.

It is an arithmetic number, because the mean of its divisors is an integer number (2165547).

Almost surely, 2^7218485 is an apocalyptic number.

It is an amenable number.

7218485 is a deficient number, since it is larger than the sum of its proper divisors (1443703).

7218485 is a wasteful number, since it uses less digits than its factorization.

7218485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1443702.

The product of its digits is 17920, while the sum is 35.

The square root of 7218485 is about 2686.7238414098. The cubic root of 7218485 is about 193.2629863631.

The spelling of 7218485 in words is "seven million, two hundred eighteen thousand, four hundred eighty-five".