7542289 has 2 divisors, whose sum is σ = 7542290. Its totient is φ = 7542288.

The previous prime is 7542277. The next prime is 7542313. The reversal of 7542289 is 9822457.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3932289 + 3610000 = 1983^2 + 1900^2 .

It is an emirp because it is prime and its reverse (9822457) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7542289 - 2⁹ = 7541777 is a prime.

It is a super-2 number, since 2×7542289² = 113772246719042, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7542389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3771144 + 3771145.

It is an arithmetic number, because the mean of its divisors is an integer number (3771145).

Almost surely, 2^7542289 is an apocalyptic number.

It is an amenable number.

7542289 is a deficient number, since it is larger than the sum of its proper divisors (1).

7542289 is an equidigital number, since it uses as much as digits as its factorization.

7542289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 37.

The square root of 7542289 is about 2746.3228142372. The cubic root of 7542289 is about 196.1105946023.

The spelling of 7542289 in words is "seven million, five hundred forty-two thousand, two hundred eighty-nine".