1052021381 has 2 divisors, whose sum is σ = 1052021382. Its totient is φ = 1052021380.

The previous prime is 1052021309. The next prime is 1052021423. The reversal of 1052021381 is 1831202501.

It is a happy number.

1052021381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1036260481 + 15760900 = 32191^2 + 3970^2 .

It is a cyclic number.

It is not a de Polignac number, because 1052021381 - 2¹⁰ = 1052020357 is a prime.

It is a super-2 number, since 2×1052021381² = 2213497972162294322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1052021881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 526010690 + 526010691.

It is an arithmetic number, because the mean of its divisors is an integer number (526010691).

Almost surely, 2^1052021381 is an apocalyptic number.

It is an amenable number.

1052021381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1052021381 is an equidigital number, since it uses as much as digits as its factorization.

1052021381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 1052021381 is about 32434.8790810140. The cubic root of 1052021381 is about 1017.0481686521.

Adding to 1052021381 its reverse (1831202501), we get a palindrome (2883223882).

The spelling of 1052021381 in words is "one billion, fifty-two million, twenty-one thousand, three hundred eighty-one".