7290257 has 8 divisors (see below), whose sum is σ = 7940520. Its totient is φ = 6652800.

The previous prime is 7290233. The next prime is 7290271. The reversal of 7290257 is 7520927.

It can be written as a sum of positive squares in 4 ways, for example, as 59536 + 7230721 = 244^2 + 2689^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7290257 - 2⁶ = 7290193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7290557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1994 + ... + 4307.

It is an arithmetic number, because the mean of its divisors is an integer number (992565).

Almost surely, 2^7290257 is an apocalyptic number.

It is an amenable number.

7290257 is a deficient number, since it is larger than the sum of its proper divisors (650263).

7290257 is a wasteful number, since it uses less digits than its factorization.

7290257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6403.

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 7290257 is about 2700.0475921731. The cubic root of 7290257 is about 193.9014006346.

The spelling of 7290257 in words is "seven million, two hundred ninety thousand, two hundred fifty-seven".