1281055047 has 8 divisors (see below), whose sum is σ = 1710065280. Its totient is φ = 853040760.

The previous prime is 1281055037. The next prime is 1281055133. The reversal of 1281055047 is 7405501821.

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

It is not a de Polignac number, because 1281055047 - 2¹¹ = 1281052999 is a prime.

It is a super-2 number, since 2×1281055047² = 3282204066888344418, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1281054999 and 1281055017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281055007) 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, 245979 + ... + 251132.

It is an arithmetic number, because the mean of its divisors is an integer number (213758160).

Almost surely, 2^1281055047 is an apocalyptic number.

1281055047 is a deficient number, since it is larger than the sum of its proper divisors (429010233).

1281055047 is an equidigital number, since it uses as much as digits as its factorization.

1281055047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497973.

The product of its (nonzero) digits is 11200, while the sum is 33.

The square root of 1281055047 is about 35791.8293329637. The cubic root of 1281055047 is about 1086.0652811878.

Adding to 1281055047 its reverse (7405501821), we get a palindrome (8686556868).

The spelling of 1281055047 in words is "one billion, two hundred eighty-one million, fifty-five thousand, forty-seven".