7212257 has 4 divisors (see below), whose sum is σ = 7767060. Its totient is φ = 6657456.

The previous prime is 7212253. The next prime is 7212259. The reversal of 7212257 is 7522127.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4393216 + 2819041 = 2096^2 + 1679^2 .

It is not a de Polignac number, because 7212257 - 2² = 7212253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7212253) 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, 277382 + ... + 277407.

It is an arithmetic number, because the mean of its divisors is an integer number (1941765).

Almost surely, 2^7212257 is an apocalyptic number.

It is an amenable number.

7212257 is a deficient number, since it is larger than the sum of its proper divisors (554803).

7212257 is a wasteful number, since it uses less digits than its factorization.

7212257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554802.

The product of its digits is 1960, while the sum is 26.

The square root of 7212257 is about 2685.5645588963. The cubic root of 7212257 is about 193.2073889071.

The spelling of 7212257 in words is "seven million, two hundred twelve thousand, two hundred fifty-seven".