1281148 has 18 divisors (see below), whose sum is σ = 2465288. Its totient is φ = 582120.

The previous prime is 1281131. The next prime is 1281149. The reversal of 1281148 is 8411821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 840 + ... + 1807.

2^1281148 is an apocalyptic number.

It is an amenable number.

1281148 is a deficient number, since it is larger than the sum of its proper divisors (1184140).

1281148 is a wasteful number, since it uses less digits than its factorization.

1281148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2673 (or 2660 counting only the distinct ones).

The product of its digits is 512, while the sum is 25.

The square root of 1281148 is about 1131.8780853078. The cubic root of 1281148 is about 108.6091548751.

Adding to 1281148 its reverse (8411821), we get a palindrome (9692969).

The spelling of 1281148 in words is "one million, two hundred eighty-one thousand, one hundred forty-eight".