1312506133 has 2 divisors, whose sum is σ = 1312506134. Its totient is φ = 1312506132.

The previous prime is 1312506121. The next prime is 1312506197. The reversal of 1312506133 is 3316052131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 904385329 + 408120804 = 30073^2 + 20202^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312506133 is a prime.

It is a super-2 number, since 2×1312506133² = 3445344698325227378, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1312506098 and 1312506107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312506103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656253066 + 656253067.

It is an arithmetic number, because the mean of its divisors is an integer number (656253067).

Almost surely, 2^1312506133 is an apocalyptic number.

It is an amenable number.

1312506133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312506133 is an equidigital number, since it uses as much as digits as its factorization.

1312506133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 1312506133 is about 36228.5265088162. The cubic root of 1312506133 is about 1094.8814903402.

Adding to 1312506133 its reverse (3316052131), we get a palindrome (4628558264).

The spelling of 1312506133 in words is "one billion, three hundred twelve million, five hundred six thousand, one hundred thirty-three".