1293479056 has 10 divisors (see below), whose sum is σ = 2506115702. Its totient is φ = 646739520.

The previous prime is 1293479027. The next prime is 1293479063. The reversal of 1293479056 is 6509743921.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1016589456 + 276889600 = 31884^2 + 16640^2 .

It is a super-2 number, since 2×1293479056² = 3346176136621302272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1293478997 and 1293479015.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40421205 + ... + 40421236.

Almost surely, 2^1293479056 is an apocalyptic number.

1293479056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1293479056 is a deficient number, since it is larger than the sum of its proper divisors (1212636646).

1293479056 is an equidigital number, since it uses as much as digits as its factorization.

1293479056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80842449 (or 80842443 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 1293479056 is about 35964.9698456707. The cubic root of 1293479056 is about 1089.5649741164.

The spelling of 1293479056 in words is "one billion, two hundred ninety-three million, four hundred seventy-nine thousand, fifty-six".