1042055121 has 4 divisors (see below), whose sum is σ = 1389406832. Its totient is φ = 694703412.

The previous prime is 1042055107. The next prime is 1042055129. The reversal of 1042055121 is 1215502401.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1215502401 = 3 ⋅405167467.

It is not a de Polignac number, because 1042055121 - 2¹¹ = 1042053073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1042055129) 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 3 ways as a sum of consecutive naturals, for example, 173675851 + ... + 173675856.

It is an arithmetic number, because the mean of its divisors is an integer number (347351708).

Almost surely, 2^1042055121 is an apocalyptic number.

It is an amenable number.

1042055121 is a deficient number, since it is larger than the sum of its proper divisors (347351711).

1042055121 is an equidigital number, since it uses as much as digits as its factorization.

1042055121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347351710.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 1042055121 is about 32280.8785661109. The cubic root of 1042055121 is about 1013.8263253471.

Adding to 1042055121 its reverse (1215502401), we get a palindrome (2257557522).

The spelling of 1042055121 in words is "one billion, forty-two million, fifty-five thousand, one hundred twenty-one".