1289148 has 48 divisors (see below), whose sum is σ = 3494400. Its totient is φ = 362304.

The previous prime is 1289129. The next prime is 1289149. The reversal of 1289148 is 8419821.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1289149) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 8578 + ... + 8726.

It is an arithmetic number, because the mean of its divisors is an integer number (72800).

2^1289148 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1289148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1747200).

1289148 is an abundant number, since it is smaller than the sum of its proper divisors (2205252).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1289148 is a wasteful number, since it uses less digits than its factorization.

1289148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 264 counting only the distinct ones).

The product of its digits is 4608, while the sum is 33.

The square root of 1289148 is about 1135.4065351230. The cubic root of 1289148 is about 108.8347522707.

The spelling of 1289148 in words is "one million, two hundred eighty-nine thousand, one hundred forty-eight".