1426020581 has 2 divisors, whose sum is σ = 1426020582. Its totient is φ = 1426020580.

The previous prime is 1426020577. The next prime is 1426020601. The reversal of 1426020581 is 1850206241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 787700356 + 638320225 = 28066^2 + 25265^2 .

It is a cyclic number.

It is not a de Polignac number, because 1426020581 - 2² = 1426020577 is a prime.

It is a super-2 number, since 2×1426020581² = 4067069394871155122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1426020511) 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 as a sum of consecutive naturals, namely, 713010290 + 713010291.

It is an arithmetic number, because the mean of its divisors is an integer number (713010291).

Almost surely, 2^1426020581 is an apocalyptic number.

It is an amenable number.

1426020581 is a deficient number, since it is larger than the sum of its proper divisors (1).

1426020581 is an equidigital number, since it uses as much as digits as its factorization.

1426020581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 1426020581 is about 37762.6876824201. The cubic root of 1426020581 is about 1125.5771408392.

The spelling of 1426020581 in words is "one billion, four hundred twenty-six million, twenty thousand, five hundred eighty-one".