1075052221 has 4 divisors (see below), whose sum is σ = 1075430844. Its totient is φ = 1074673600.

The previous prime is 1075052207. The next prime is 1075052249. The reversal of 1075052221 is 1222505701.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 283248900 + 791803321 = 16830^2 + 28139^2 .

It is a cyclic number.

It is not a de Polignac number, because 1075052221 - 2⁵ = 1075052189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1075032221) 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 in 3 ways as a sum of consecutive naturals, for example, 185020 + ... + 190741.

It is an arithmetic number, because the mean of its divisors is an integer number (268857711).

Almost surely, 2^1075052221 is an apocalyptic number.

It is an amenable number.

1075052221 is a deficient number, since it is larger than the sum of its proper divisors (378623).

1075052221 is an equidigital number, since it uses as much as digits as its factorization.

1075052221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378622.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 1075052221 is about 32787.9889746230. The cubic root of 1075052221 is about 1024.4163946440.

Adding to 1075052221 its reverse (1222505701), we get a palindrome (2297557922).

The spelling of 1075052221 in words is "one billion, seventy-five million, fifty-two thousand, two hundred twenty-one".