7212018 has 32 divisors (see below), whose sum is σ = 16422912. Its totient is φ = 2090000.

The previous prime is 7212013. The next prime is 7212019. The reversal of 7212018 is 8102127.

It is a junction number, because it is equal to n+sod(n) for n = 7211985 and 7212003.

It is not an unprimeable number, because it can be changed into a prime (7212011) 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 15 ways as a sum of consecutive naturals, for example, 858 + ... + 3893.

It is an arithmetic number, because the mean of its divisors is an integer number (513216).

Almost surely, 2^7212018 is an apocalyptic number.

7212018 is an abundant number, since it is smaller than the sum of its proper divisors (9210894).

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

7212018 is a wasteful number, since it uses less digits than its factorization.

7212018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4790.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 7212018 is about 2685.5200613661. The cubic root of 7212018 is about 193.2052547126.

It can be divided in two parts, 72 and 12018, that added together give a triangular number (12090 = T₁₅₅).

The spelling of 7212018 in words is "seven million, two hundred twelve thousand, eighteen".