1161325541 has 2 divisors, whose sum is σ = 1161325542. Its totient is φ = 1161325540.

The previous prime is 1161325531. The next prime is 1161325577. The reversal of 1161325541 is 1455231611.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1138725025 + 22600516 = 33745^2 + 4754^2 .

It is an emirp because it is prime and its reverse (1455231611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1161325541 - 2²² = 1157131237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161325531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580662770 + 580662771.

It is an arithmetic number, because the mean of its divisors is an integer number (580662771).

Almost surely, 2^1161325541 is an apocalyptic number.

It is an amenable number.

1161325541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161325541 is an equidigital number, since it uses as much as digits as its factorization.

1161325541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 29.

The square root of 1161325541 is about 34078.2267877893. The cubic root of 1161325541 is about 1051.1176431916.

The spelling of 1161325541 in words is "one billion, one hundred sixty-one million, three hundred twenty-five thousand, five hundred forty-one".