7251257 has 4 divisors (see below), whose sum is σ = 7809060. Its totient is φ = 6693456.

The previous prime is 7251239. The next prime is 7251269. The reversal of 7251257 is 7521527.

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 4227136 + 3024121 = 2056^2 + 1739^2 .

It is a cyclic number.

It is not a de Polignac number, because 7251257 - 2¹⁸ = 6989113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7251227) 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 3 ways as a sum of consecutive naturals, for example, 278882 + ... + 278907.

It is an arithmetic number, because the mean of its divisors is an integer number (1952265).

Almost surely, 2^7251257 is an apocalyptic number.

It is an amenable number.

7251257 is a deficient number, since it is larger than the sum of its proper divisors (557803).

7251257 is a wasteful number, since it uses less digits than its factorization.

7251257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557802.

The product of its digits is 4900, while the sum is 29.

The square root of 7251257 is about 2692.8158124907. The cubic root of 7251257 is about 193.5550168837. Note that the first 3 decimals are identical.

The spelling of 7251257 in words is "seven million, two hundred fifty-one thousand, two hundred fifty-seven".