1115405121 has 4 divisors (see below), whose sum is σ = 1487206832. Its totient is φ = 743603412.

The previous prime is 1115405119. The next prime is 1115405143. The reversal of 1115405121 is 1215045111.

1115405121 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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 1115405121 - 2¹ = 1115405119 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1115405321) 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, 185900851 + ... + 185900856.

It is an arithmetic number, because the mean of its divisors is an integer number (371801708).

Almost surely, 2^1115405121 is an apocalyptic number.

It is an amenable number.

1115405121 is a deficient number, since it is larger than the sum of its proper divisors (371801711).

1115405121 is an equidigital number, since it uses as much as digits as its factorization.

1115405121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371801710.

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

The square root of 1115405121 is about 33397.6813716162. The cubic root of 1115405121 is about 1037.0767022597.

The spelling of 1115405121 in words is "one billion, one hundred fifteen million, four hundred five thousand, one hundred twenty-one".