1425563081 has 2 divisors, whose sum is σ = 1425563082. Its totient is φ = 1425563080.

The previous prime is 1425563057. The next prime is 1425563089. The reversal of 1425563081 is 1803655241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1151991481 + 273571600 = 33941^2 + 16540^2 .

It is a cyclic number.

It is not a de Polignac number, because 1425563081 - 2¹⁴ = 1425546697 is a prime.

It is a super-2 number, since 2×1425563081² = 4064460195820425122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1425563089) 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, 712781540 + 712781541.

It is an arithmetic number, because the mean of its divisors is an integer number (712781541).

Almost surely, 2^1425563081 is an apocalyptic number.

It is an amenable number.

1425563081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1425563081 is an equidigital number, since it uses as much as digits as its factorization.

1425563081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 1425563081 is about 37756.6296297750. The cubic root of 1425563081 is about 1125.4567576722.

The spelling of 1425563081 in words is "one billion, four hundred twenty-five million, five hundred sixty-three thousand, eighty-one".