1312256450 has 54 divisors (see below), whose sum is σ = 2516922891. Its totient is φ = 509021280.

The previous prime is 1312256419. The next prime is 1312256483. The reversal of 1312256450 is 546522131.

It can be written as a sum of positive squares in 5 ways, for example, as 735440161 + 576816289 = 27119^2 + 24017^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=25615.

It is a super-3 number, since 3×1312256450³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 12038996 + ... + 12039104.

Almost surely, 2^1312256450 is an apocalyptic number.

1312256450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1312256450 is a deficient number, since it is larger than the sum of its proper divisors (1204666441).

1312256450 is an equidigital number, since it uses as much as digits as its factorization.

1312256450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 1312256450 is about 36225.0804001868. The cubic root of 1312256450 is about 1094.8120581232.

Multiplying 1312256450 by its product of nonzero digits (7200), we get a square (9448246440000 = 3073800²).

Adding to 1312256450 its reverse (546522131), we get a palindrome (1858778581).

The spelling of 1312256450 in words is "one billion, three hundred twelve million, two hundred fifty-six thousand, four hundred fifty".