1280418047 has 4 divisors (see below), whose sum is σ = 1298452176. Its totient is φ = 1262383920.

The previous prime is 1280418023. The next prime is 1280418091. The reversal of 1280418047 is 7408140821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7408140821 = 50989 ⋅145289.

It is a cyclic number.

It is not a de Polignac number, because 1280418047 - 2⁸ = 1280417791 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1280417998 and 1280418016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280498047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9016958 + ... + 9017099.

It is an arithmetic number, because the mean of its divisors is an integer number (324613044).

Almost surely, 2^1280418047 is an apocalyptic number.

1280418047 is a deficient number, since it is larger than the sum of its proper divisors (18034129).

1280418047 is an equidigital number, since it uses as much as digits as its factorization.

1280418047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18034128.

The product of its (nonzero) digits is 14336, while the sum is 35.

The square root of 1280418047 is about 35782.9295474812. The cubic root of 1280418047 is about 1085.8852373283.

Adding to 1280418047 its reverse (7408140821), we get a palindrome (8688558868).

The spelling of 1280418047 in words is "one billion, two hundred eighty million, four hundred eighteen thousand, forty-seven".