1051778401 has 2 divisors, whose sum is σ = 1051778402. Its totient is φ = 1051778400.

The previous prime is 1051778393. The next prime is 1051778417. The reversal of 1051778401 is 1048771501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 617472801 + 434305600 = 24849^2 + 20840^2 .

It is a cyclic number.

It is not a de Polignac number, because 1051778401 - 2³ = 1051778393 is a prime.

It is a super-2 number, since 2×1051778401² = 2212475609620233602, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1051778501) 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 as a sum of consecutive naturals, namely, 525889200 + 525889201.

It is an arithmetic number, because the mean of its divisors is an integer number (525889201).

Almost surely, 2^1051778401 is an apocalyptic number.

It is an amenable number.

1051778401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1051778401 is an equidigital number, since it uses as much as digits as its factorization.

1051778401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7840, while the sum is 34.

The square root of 1051778401 is about 32431.1332056097. The cubic root of 1051778401 is about 1016.9698618177.

The spelling of 1051778401 in words is "one billion, fifty-one million, seven hundred seventy-eight thousand, four hundred one".