1312256449 has 8 divisors (see below), whose sum is σ = 1515183488. Its totient is φ = 1113194880.

The previous prime is 1312256419. The next prime is 1312256483. The reversal of 1312256449 is 9446522131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1312256449 - 2⁷ = 1312256321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1312256419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 965637 + ... + 966994.

It is an arithmetic number, because the mean of its divisors is an integer number (189397936).

Almost surely, 2^1312256449 is an apocalyptic number.

It is an amenable number.

1312256449 is a deficient number, since it is larger than the sum of its proper divisors (202927039).

1312256449 is an equidigital number, since it uses as much as digits as its factorization.

1312256449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1932735.

The product of its digits is 51840, while the sum is 37.

The square root of 1312256449 is about 36225.0803863842. The cubic root of 1312256449 is about 1094.8120578451.

The spelling of 1312256449 in words is "one billion, three hundred twelve million, two hundred fifty-six thousand, four hundred forty-nine".