7123257 has 6 divisors (see below), whose sum is σ = 10289162. Its totient is φ = 4748832.

The previous prime is 7123231. The next prime is 7123279. The reversal of 7123257 is 7523217.

7123257 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 4064256 + 3059001 = 2016^2 + 1749^2 .

It is not a de Polignac number, because 7123257 - 2¹¹ = 7121209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7123257.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7123297) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 395728 + ... + 395745.

Almost surely, 2^7123257 is an apocalyptic number.

It is an amenable number.

7123257 is a deficient number, since it is larger than the sum of its proper divisors (3165905).

7123257 is a wasteful number, since it uses less digits than its factorization.

7123257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791479 (or 791476 counting only the distinct ones).

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

The square root of 7123257 is about 2668.9430492238. The cubic root of 7123257 is about 192.4093642023.

It can be divided in two parts, 71232 and 57, that added together give a square (71289 = 267²).

The spelling of 7123257 in words is "seven million, one hundred twenty-three thousand, two hundred fifty-seven".