7212361 has 4 divisors (see below), whose sum is σ = 7767172. Its totient is φ = 6657552.

The previous prime is 7212353. The next prime is 7212371. The reversal of 7212361 is 1632127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1632127 = 7 ⋅233161.

It can be written as a sum of positive squares in 2 ways, for example, as 962361 + 6250000 = 981^2 + 2500^2 .

It is a cyclic number.

It is not a de Polignac number, because 7212361 - 2³ = 7212353 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7212311) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 277386 + ... + 277411.

It is an arithmetic number, because the mean of its divisors is an integer number (1941793).

Almost surely, 2^7212361 is an apocalyptic number.

It is an amenable number.

7212361 is a deficient number, since it is larger than the sum of its proper divisors (554811).

7212361 is a wasteful number, since it uses less digits than its factorization.

7212361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554810.

The product of its digits is 504, while the sum is 22.

The square root of 7212361 is about 2685.5839216081. The cubic root of 7212361 is about 193.2083175795.

Adding to 7212361 its reverse (1632127), we get a palindrome (8844488).

The spelling of 7212361 in words is "seven million, two hundred twelve thousand, three hundred sixty-one".