1315420081 has 2 divisors, whose sum is σ = 1315420082. Its totient is φ = 1315420080.

The previous prime is 1315420079. The next prime is 1315420121. The reversal of 1315420081 is 1800245131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1044323856 + 271096225 = 32316^2 + 16465^2 .

It is an emirp because it is prime and its reverse (1800245131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1315420081 - 2¹ = 1315420079 is a prime.

It is a super-2 number, since 2×1315420081² = 3460659978996093122, which contains 22 as substring.

Together with 1315420079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1315420021) 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, 657710040 + 657710041.

It is an arithmetic number, because the mean of its divisors is an integer number (657710041).

Almost surely, 2^1315420081 is an apocalyptic number.

It is an amenable number.

1315420081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1315420081 is an equidigital number, since it uses as much as digits as its factorization.

1315420081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 1315420081 is about 36268.7204213217. The cubic root of 1315420081 is about 1095.6911550193.

The spelling of 1315420081 in words is "one billion, three hundred fifteen million, four hundred twenty thousand, eighty-one".