1165512541 has 2 divisors, whose sum is σ = 1165512542. Its totient is φ = 1165512540.

The previous prime is 1165512493. The next prime is 1165512563. The reversal of 1165512541 is 1452155611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 976312516 + 189200025 = 31246^2 + 13755^2 .

It is an emirp because it is prime and its reverse (1452155611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1165512541 - 2¹⁵ = 1165479773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1165512941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582756270 + 582756271.

It is an arithmetic number, because the mean of its divisors is an integer number (582756271).

Almost surely, 2^1165512541 is an apocalyptic number.

It is an amenable number.

1165512541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165512541 is an equidigital number, since it uses as much as digits as its factorization.

1165512541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6000, while the sum is 31.

The square root of 1165512541 is about 34139.6037030309. The cubic root of 1165512541 is about 1052.3793482813.

The spelling of 1165512541 in words is "one billion, one hundred sixty-five million, five hundred twelve thousand, five hundred forty-one".