1312115554 has 4 divisors (see below), whose sum is σ = 1968173334. Its totient is φ = 656057776.

The previous prime is 1312115507. The next prime is 1312115587. The reversal of 1312115554 is 4555112131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 994456225 + 317659329 = 31535^2 + 17823^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328028887 + ... + 328028890.

Almost surely, 2^1312115554 is an apocalyptic number.

1312115554 is a deficient number, since it is larger than the sum of its proper divisors (656057780).

1312115554 is an equidigital number, since it uses as much as digits as its factorization.

1312115554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656057779.

The product of its digits is 3000, while the sum is 28.

The square root of 1312115554 is about 36223.1356179997. The cubic root of 1312115554 is about 1094.7728736683.

Adding to 1312115554 its reverse (4555112131), we get a palindrome (5867227685).

The spelling of 1312115554 in words is "one billion, three hundred twelve million, one hundred fifteen thousand, five hundred fifty-four".