7140457 has 2 divisors, whose sum is σ = 7140458. Its totient is φ = 7140456.

The previous prime is 7140443. The next prime is 7140473. The reversal of 7140457 is 7540417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7080921 + 59536 = 2661^2 + 244^2 .

It is a cyclic number.

It is not a de Polignac number, because 7140457 - 2¹¹ = 7138409 is a prime.

It is a super-2 number, since 2×7140457² = 101972252337698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7140487) 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 as a sum of consecutive naturals, namely, 3570228 + 3570229.

It is an arithmetic number, because the mean of its divisors is an integer number (3570229).

Almost surely, 2^7140457 is an apocalyptic number.

It is an amenable number.

7140457 is a deficient number, since it is larger than the sum of its proper divisors (1).

7140457 is an equidigital number, since it uses as much as digits as its factorization.

7140457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 7140457 is about 2672.1633557850. The cubic root of 7140457 is about 192.5641052590.

The spelling of 7140457 in words is "seven million, one hundred forty thousand, four hundred fifty-seven".