7218902 has 4 divisors (see below), whose sum is σ = 10828356. Its totient is φ = 3609450.

The previous prime is 7218899. The next prime is 7218907. The reversal of 7218902 is 2098127.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2098127 = 47 ⋅44641.

It is a super-2 number, since 2×7218902² = 104225092171208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7218907) 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 as a sum of consecutive naturals, namely, 1804724 + ... + 1804727.

It is an arithmetic number, because the mean of its divisors is an integer number (2707089).

Almost surely, 2^7218902 is an apocalyptic number.

7218902 is a deficient number, since it is larger than the sum of its proper divisors (3609454).

7218902 is a wasteful number, since it uses less digits than its factorization.

7218902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3609453.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 7218902 is about 2686.8014440967. The cubic root of 7218902 is about 193.2667077863.

It can be divided in two parts, 7218 and 902, that multiplied together give a triangular number (6510636 = T₃₆₀₈).

The spelling of 7218902 in words is "seven million, two hundred eighteen thousand, nine hundred two".