7242818 has 18 divisors (see below), whose sum is σ = 12011097. Its totient is φ = 3273160.

The previous prime is 7242803. The next prime is 7242839. The reversal of 7242818 is 8182427.

It can be written as a sum of positive squares in 2 ways, for example, as 5697769 + 1545049 = 2387^2 + 1243^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=1903.

It is a super-2 number, since 2×7242818² = 104916825162248, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 41780 + ... + 41952.

Almost surely, 2^7242818 is an apocalyptic number.

7242818 is a deficient number, since it is larger than the sum of its proper divisors (4768279).

7242818 is a wasteful number, since it uses less digits than its factorization.

7242818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370 (or 186 counting only the distinct ones).

The product of its digits is 7168, while the sum is 32.

The square root of 7242818 is about 2691.2484091960. The cubic root of 7242818 is about 193.4799014083.

Multiplying 7242818 by its sum of digits (32), we get a square (231770176 = 15224²).

The spelling of 7242818 in words is "seven million, two hundred forty-two thousand, eight hundred eighteen".