1043855121 has 16 divisors (see below), whose sum is σ = 1440468288. Its totient is φ = 671923200.

The previous prime is 1043855083. The next prime is 1043855149. The reversal of 1043855121 is 1215583401.

It is not a de Polignac number, because 1043855121 - 2²³ = 1035466513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1043855221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31815 + ... + 55676.

It is an arithmetic number, because the mean of its divisors is an integer number (90029268).

Almost surely, 2^1043855121 is an apocalyptic number.

It is an amenable number.

1043855121 is a deficient number, since it is larger than the sum of its proper divisors (396613167).

1043855121 is an equidigital number, since it uses as much as digits as its factorization.

1043855121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87632.

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 1043855121 is about 32308.7468187796. The cubic root of 1043855121 is about 1014.4097358317.

The spelling of 1043855121 in words is "one billion, forty-three million, eight hundred fifty-five thousand, one hundred twenty-one".