1312256451 has 32 divisors (see below), whose sum is σ = 2015585280. Its totient is φ = 751053600.

The previous prime is 1312256419. The next prime is 1312256483. The reversal of 1312256451 is 1546522131.

It is an interprime number because it is at equal distance from previous prime (1312256419) and next prime (1312256483).

It is not a de Polignac number, because 1312256451 - 2⁵ = 1312256419 is a prime.

It is a super-2 number, since 2×1312256451² = 3444033986382230802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1312256051) 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 31 ways as a sum of consecutive naturals, for example, 204376 + ... + 210698.

It is an arithmetic number, because the mean of its divisors is an integer number (62987040).

Almost surely, 2^1312256451 is an apocalyptic number.

1312256451 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1312256451 is a deficient number, since it is larger than the sum of its proper divisors (703328829).

1312256451 is a wasteful number, since it uses less digits than its factorization.

1312256451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6687.

The product of its digits is 7200, while the sum is 30.

The square root of 1312256451 is about 36225.0804139894. The cubic root of 1312256451 is about 1094.8120584013.

Adding to 1312256451 its reverse (1546522131), we get a palindrome (2858778582).

The spelling of 1312256451 in words is "one billion, three hundred twelve million, two hundred fifty-six thousand, four hundred fifty-one".