7212690 has 24 divisors (see below), whose sum is σ = 18753228. Its totient is φ = 1923360.

The previous prime is 7212661. The next prime is 7212703. The reversal of 7212690 is 962127.

It can be written as a sum of positive squares in 2 ways, for example, as 7080921 + 131769 = 2661^2 + 363^2 .

It is a super-2 number, since 2×7212690² = 104045794072200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 39981 + ... + 40160.

Almost surely, 2^7212690 is an apocalyptic number.

7212690 is an abundant number, since it is smaller than the sum of its proper divisors (11540538).

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

7212690 is a wasteful number, since it uses less digits than its factorization.

7212690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80154 (or 80151 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 7212690 is about 2685.6451738828. The cubic root of 7212690 is about 193.2112553401.

The spelling of 7212690 in words is "seven million, two hundred twelve thousand, six hundred ninety".