7231257 has 12 divisors (see below), whose sum is σ = 11394864. Its totient is φ = 4382520.

The previous prime is 7231247. The next prime is 7231261. The reversal of 7231257 is 7521327.

It is not a de Polignac number, because 7231257 - 2⁶ = 7231193 is a prime.

7231257 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7231257.

It is not an unprimeable number, because it can be changed into a prime (7231247) 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 11 ways as a sum of consecutive naturals, for example, 36423 + ... + 36620.

It is an arithmetic number, because the mean of its divisors is an integer number (949572).

Almost surely, 2^7231257 is an apocalyptic number.

It is an amenable number.

7231257 is a deficient number, since it is larger than the sum of its proper divisors (4163607).

7231257 is a wasteful number, since it uses less digits than its factorization.

7231257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73060 (or 73057 counting only the distinct ones).

The product of its digits is 2940, while the sum is 27.

The square root of 7231257 is about 2689.0996634562. The cubic root of 7231257 is about 193.3769022563.

It can be divided in two parts, 72 and 31257, that added together give a square (31329 = 177²).

The spelling of 7231257 in words is "seven million, two hundred thirty-one thousand, two hundred fifty-seven".