1312677481 has 4 divisors (see below), whose sum is σ = 1313906500. Its totient is φ = 1311448464.

The previous prime is 1312677451. The next prime is 1312677493. The reversal of 1312677481 is 1847762131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1847762131 = 7589 ⋅243479.

It can be written as a sum of positive squares in 2 ways, for example, as 1060153600 + 252523881 = 32560^2 + 15891^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312677481 - 2⁹ = 1312676969 is a prime.

It is a super-2 number, since 2×1312677481² = 3446244338249010722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312677451) 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 in 3 ways as a sum of consecutive naturals, for example, 612906 + ... + 615043.

It is an arithmetic number, because the mean of its divisors is an integer number (328476625).

Almost surely, 2^1312677481 is an apocalyptic number.

It is an amenable number.

1312677481 is a deficient number, since it is larger than the sum of its proper divisors (1229019).

1312677481 is a wasteful number, since it uses less digits than its factorization.

1312677481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229018.

The product of its digits is 56448, while the sum is 40.

The square root of 1312677481 is about 36230.8912531834. The cubic root of 1312677481 is about 1094.9291339500.

The spelling of 1312677481 in words is "one billion, three hundred twelve million, six hundred seventy-seven thousand, four hundred eighty-one".