1051361281 has 2 divisors, whose sum is σ = 1051361282. Its totient is φ = 1051361280.

The previous prime is 1051361279. The next prime is 1051361293. The reversal of 1051361281 is 1821631501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1043290000 + 8071281 = 32300^2 + 2841^2 .

It is a cyclic number.

It is not a de Polignac number, because 1051361281 - 2¹ = 1051361279 is a prime.

It is a super-2 number, since 2×1051361281² = 2210721086371921922, which contains 22 as substring.

Together with 1051361279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1051361221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525680640 + 525680641.

It is an arithmetic number, because the mean of its divisors is an integer number (525680641).

It is a Proth number, since it is equal to 32085 ⋅ 2¹⁵ + 1 and 32085 < 2¹⁵.

Almost surely, 2^1051361281 is an apocalyptic number.

It is an amenable number.

1051361281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1051361281 is an equidigital number, since it uses as much as digits as its factorization.

1051361281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1051361281 is about 32424.7017102702. The cubic root of 1051361281 is about 1016.8354055616.

Adding to 1051361281 its reverse (1821631501), we get a palindrome (2872992782).

The spelling of 1051361281 in words is "one billion, fifty-one million, three hundred sixty-one thousand, two hundred eighty-one".