1115154541 has 2 divisors, whose sum is σ = 1115154542. Its totient is φ = 1115154540.

The previous prime is 1115154533. The next prime is 1115154569. The reversal of 1115154541 is 1454515111.

It is an a-pointer prime, because the next prime (1115154569) can be obtained adding 1115154541 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 593945641 + 521208900 = 24371^2 + 22830^2 .

It is a cyclic number.

It is not a de Polignac number, because 1115154541 - 2³ = 1115154533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1115154511) 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, 557577270 + 557577271.

It is an arithmetic number, because the mean of its divisors is an integer number (557577271).

Almost surely, 2^1115154541 is an apocalyptic number.

It is an amenable number.

1115154541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115154541 is an equidigital number, since it uses as much as digits as its factorization.

1115154541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2000, while the sum is 28.

The square root of 1115154541 is about 33393.9297028667. The cubic root of 1115154541 is about 1036.9990353690. Note that the first 3 decimals are identical.

Adding to 1115154541 its reverse (1454515111), we get a palindrome (2569669652).

The spelling of 1115154541 in words is "one billion, one hundred fifteen million, one hundred fifty-four thousand, five hundred forty-one".