7540289 has 2 divisors, whose sum is σ = 7540290. Its totient is φ = 7540288.

The previous prime is 7540277. The next prime is 7540327. The reversal of 7540289 is 9820457.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7333264 + 207025 = 2708^2 + 455^2 .

It is an emirp because it is prime and its reverse (9820457) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7540289 is a prime.

It is not a weakly prime, because it can be changed into another prime (7540219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3770144 + 3770145.

It is an arithmetic number, because the mean of its divisors is an integer number (3770145).

Almost surely, 2^7540289 is an apocalyptic number.

It is an amenable number.

7540289 is a deficient number, since it is larger than the sum of its proper divisors (1).

7540289 is an equidigital number, since it uses as much as digits as its factorization.

7540289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 7540289 is about 2745.9586668411. The cubic root of 7540289 is about 196.0932587571.

The spelling of 7540289 in words is "seven million, five hundred forty thousand, two hundred eighty-nine".