1312401771 has 20 divisors (see below), whose sum is σ = 2023747264. Its totient is φ = 846709200.

The previous prime is 1312401733. The next prime is 1312401787. The reversal of 1312401771 is 1771042131.

It is not a de Polignac number, because 1312401771 - 2¹¹ = 1312399723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312401271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 258820 + ... + 263841.

Almost surely, 2^1312401771 is an apocalyptic number.

1312401771 is a deficient number, since it is larger than the sum of its proper divisors (711345493).

1312401771 is an equidigital number, since it uses as much as digits as its factorization.

1312401771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522704 (or 522695 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 1312401771 is about 36227.0861511107. The cubic root of 1312401771 is about 1094.8524702724.

The spelling of 1312401771 in words is "one billion, three hundred twelve million, four hundred one thousand, seven hundred seventy-one".