1305425081 has 2 divisors, whose sum is σ = 1305425082. Its totient is φ = 1305425080.

The previous prime is 1305425063. The next prime is 1305425123. The reversal of 1305425081 is 1805245031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1302127225 + 3297856 = 36085^2 + 1816^2 .

It is a cyclic number.

It is not a de Polignac number, because 1305425081 - 2²⁶ = 1238316217 is a prime.

It is a super-2 number, since 2×1305425081² = 3408269284207713122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1305421081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652712540 + 652712541.

It is an arithmetic number, because the mean of its divisors is an integer number (652712541).

Almost surely, 2^1305425081 is an apocalyptic number.

It is an amenable number.

1305425081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305425081 is an equidigital number, since it uses as much as digits as its factorization.

1305425081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 1305425081 is about 36130.6667666125. Note that the first 3 decimals coincide. The cubic root of 1305425081 is about 1092.9089542396.

The spelling of 1305425081 in words is "one billion, three hundred five million, four hundred twenty-five thousand, eighty-one".