1312154681 has 2 divisors, whose sum is σ = 1312154682. Its totient is φ = 1312154680.

The previous prime is 1312154653. The next prime is 1312154689. The reversal of 1312154681 is 1864512131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1260889081 + 51265600 = 35509^2 + 7160^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312154681 - 2¹⁸ = 1311892537 is a prime.

It is a super-2 number, since 2×1312154681² = 3443499813740423522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1312154689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656077340 + 656077341.

It is an arithmetic number, because the mean of its divisors is an integer number (656077341).

Almost surely, 2^1312154681 is an apocalyptic number.

It is an amenable number.

1312154681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312154681 is an equidigital number, since it uses as much as digits as its factorization.

1312154681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 32.

The square root of 1312154681 is about 36223.6756969803. The cubic root of 1312154681 is about 1094.7837555230.

The spelling of 1312154681 in words is "one billion, three hundred twelve million, one hundred fifty-four thousand, six hundred eighty-one".