1312054161 has 32 divisors (see below), whose sum is σ = 1959624576. Its totient is φ = 773952000.

The previous prime is 1312054157. The next prime is 1312054171. The reversal of 1312054161 is 1614502131.

It is a happy number.

It is not a de Polignac number, because 1312054161 - 2² = 1312054157 is a prime.

It is a super-2 number, since 2×1312054161² = 3442972242794827842, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1312054111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 752751 + ... + 754491.

It is an arithmetic number, because the mean of its divisors is an integer number (61238268).

Almost surely, 2^1312054161 is an apocalyptic number.

1312054161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1312054161 is a deficient number, since it is larger than the sum of its proper divisors (647570415).

1312054161 is a wasteful number, since it uses less digits than its factorization.

1312054161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2353.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1312054161 is about 36222.2881800695. The cubic root of 1312054161 is about 1094.7557988411.

Adding to 1312054161 its reverse (1614502131), we get a palindrome (2926556292).

The spelling of 1312054161 in words is "one billion, three hundred twelve million, fifty-four thousand, one hundred sixty-one".