1261313 has 2 divisors, whose sum is σ = 1261314. Its totient is φ = 1261312.

The previous prime is 1261301. The next prime is 1261321. The reversal of 1261313 is 3131621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1024144 + 237169 = 1012^2 + 487^2 .

It is a cyclic number.

It is not a de Polignac number, because 1261313 - 2¹⁸ = 999169 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1261291 and 1261300.

It is not a weakly prime, because it can be changed into another prime (1261333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630656 + 630657.

It is an arithmetic number, because the mean of its divisors is an integer number (630657).

2^1261313 is an apocalyptic number.

It is an amenable number.

1261313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1261313 is an equidigital number, since it uses as much as digits as its factorization.

1261313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108, while the sum is 17.

The square root of 1261313 is about 1123.0819204315. The cubic root of 1261313 is about 108.0457339457.

Adding to 1261313 its reverse (3131621), we get a palindrome (4392934).

The spelling of 1261313 in words is "one million, two hundred sixty-one thousand, three hundred thirteen".