7490257 has 2 divisors, whose sum is σ = 7490258. Its totient is φ = 7490256.

The previous prime is 7490239. The next prime is 7490297. The reversal of 7490257 is 7520947.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7268416 + 221841 = 2696^2 + 471^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7490257 is a prime.

It is a super-2 number, since 2×7490257² = 112207899852098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7490297) 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 as a sum of consecutive naturals, namely, 3745128 + 3745129.

It is an arithmetic number, because the mean of its divisors is an integer number (3745129).

Almost surely, 2^7490257 is an apocalyptic number.

It is an amenable number.

7490257 is a deficient number, since it is larger than the sum of its proper divisors (1).

7490257 is an equidigital number, since it uses as much as digits as its factorization.

7490257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 7490257 is about 2736.8333891562. The cubic root of 7490257 is about 195.6585840941.

The spelling of 7490257 in words is "seven million, four hundred ninety thousand, two hundred fifty-seven".