7172257 has 4 divisors (see below), whose sum is σ = 7179796. Its totient is φ = 7164720.

The previous prime is 7172237. The next prime is 7172267. The reversal of 7172257 is 7522717.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7522717 = 601 ⋅12517.

It can be written as a sum of positive squares in 2 ways, for example, as 1002001 + 6170256 = 1001^2 + 2484^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7172257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7172237) 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, 2094 + ... + 4327.

It is an arithmetic number, because the mean of its divisors is an integer number (1794949).

Almost surely, 2^7172257 is an apocalyptic number.

It is an amenable number.

7172257 is a deficient number, since it is larger than the sum of its proper divisors (7539).

7172257 is a wasteful number, since it uses less digits than its factorization.

7172257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7538.

The product of its digits is 6860, while the sum is 31.

The square root of 7172257 is about 2678.1069806862. The cubic root of 7172257 is about 192.8495431325.

The spelling of 7172257 in words is "seven million, one hundred seventy-two thousand, two hundred fifty-seven".