1975426081 has 2 divisors, whose sum is σ = 1975426082. Its totient is φ = 1975426080.

The previous prime is 1975426069. The next prime is 1975426097. The reversal of 1975426081 is 1806245791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1544490000 + 430936081 = 39300^2 + 20759^2 .

It is a cyclic number.

It is not a de Polignac number, because 1975426081 - 2¹³ = 1975417889 is a prime.

It is a super-2 number, since 2×1975426081² = 7804616402990037122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1975426381) 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, 987713040 + 987713041.

It is an arithmetic number, because the mean of its divisors is an integer number (987713041).

Almost surely, 2^1975426081 is an apocalyptic number.

It is an amenable number.

1975426081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1975426081 is an equidigital number, since it uses as much as digits as its factorization.

1975426081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 1975426081 is about 44445.7656138355. The cubic root of 1975426081 is about 1254.7395704115.

The spelling of 1975426081 in words is "one billion, nine hundred seventy-five million, four hundred twenty-six thousand, eighty-one".