1115021541 has 4 divisors (see below), whose sum is σ = 1486695392. Its totient is φ = 743347692.

The previous prime is 1115021521. The next prime is 1115021573. The reversal of 1115021541 is 1451205111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1115021541 - 2¹⁹ = 1114497253 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1115021521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185836921 + ... + 185836926.

It is an arithmetic number, because the mean of its divisors is an integer number (371673848).

Almost surely, 2^1115021541 is an apocalyptic number.

It is an amenable number.

1115021541 is a deficient number, since it is larger than the sum of its proper divisors (371673851).

1115021541 is an equidigital number, since it uses as much as digits as its factorization.

1115021541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371673850.

The product of its (nonzero) digits is 200, while the sum is 21.

The square root of 1115021541 is about 33391.9382635989. The cubic root of 1115021541 is about 1036.9578074942.

Adding to 1115021541 its reverse (1451205111), we get a palindrome (2566226652).

The spelling of 1115021541 in words is "one billion, one hundred fifteen million, twenty-one thousand, five hundred forty-one".