1281360137 has 2 divisors, whose sum is σ = 1281360138. Its totient is φ = 1281360136.

The previous prime is 1281360121. The next prime is 1281360149. The reversal of 1281360137 is 7310631821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 683508736 + 597851401 = 26144^2 + 24451^2 .

It is an emirp because it is prime and its reverse (7310631821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1281360137 - 2⁴ = 1281360121 is a prime.

It is a super-3 number, since 3×1281360137³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1281360187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640680068 + 640680069.

It is an arithmetic number, because the mean of its divisors is an integer number (640680069).

Almost surely, 2^1281360137 is an apocalyptic number.

It is an amenable number.

1281360137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281360137 is an equidigital number, since it uses as much as digits as its factorization.

1281360137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 1281360137 is about 35796.0910854803. The cubic root of 1281360137 is about 1086.1514917314.

Adding to 1281360137 its reverse (7310631821), we get a palindrome (8591991958).

The spelling of 1281360137 in words is "one billion, two hundred eighty-one million, three hundred sixty thousand, one hundred thirty-seven".