1128397541 has 2 divisors, whose sum is σ = 1128397542. Its totient is φ = 1128397540.

The previous prime is 1128397513. The next prime is 1128397577. The reversal of 1128397541 is 1457938211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 877048225 + 251349316 = 29615^2 + 15854^2 .

It is a cyclic number.

It is not a de Polignac number, because 1128397541 - 2⁶ = 1128397477 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1128397741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564198770 + 564198771.

It is an arithmetic number, because the mean of its divisors is an integer number (564198771).

Almost surely, 2^1128397541 is an apocalyptic number.

It is an amenable number.

1128397541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128397541 is an equidigital number, since it uses as much as digits as its factorization.

1128397541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 41.

The square root of 1128397541 is about 33591.6290316501. The cubic root of 1128397541 is about 1041.0878474688.

The spelling of 1128397541 in words is "one billion, one hundred twenty-eight million, three hundred ninety-seven thousand, five hundred forty-one".