1281147 has 8 divisors (see below), whose sum is σ = 1952256. Its totient is φ = 732072.

The previous prime is 1281131. The next prime is 1281149. The reversal of 1281147 is 7411821.

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

It is not a de Polignac number, because 1281147 - 2⁴ = 1281131 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1281149) 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, 30483 + ... + 30524.

It is an arithmetic number, because the mean of its divisors is an integer number (244032).

2^1281147 is an apocalyptic number.

1281147 is a deficient number, since it is larger than the sum of its proper divisors (671109).

1281147 is an equidigital number, since it uses as much as digits as its factorization.

1281147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61017.

The product of its digits is 448, while the sum is 24.

The square root of 1281147 is about 1131.8776435640. The cubic root of 1281147 is about 108.6091266168.

Adding to 1281147 its reverse (7411821), we get a palindrome (8692968).

It can be divided in two parts, 128 and 1147, that added together give a triangular number (1275 = T₅₀).

The spelling of 1281147 in words is "one million, two hundred eighty-one thousand, one hundred forty-seven".