1289376 has 108 divisors (see below), whose sum is σ = 4139226. Its totient is φ = 380160.

The previous prime is 1289371. The next prime is 1289381. The reversal of 1289376 is 6739821.

1289376 is a `hidden beast` number, since 1 + 289 + 376 = 666.

It is an interprime number because it is at equal distance from previous prime (1289371) and next prime (1289381).

It can be written as a sum of positive squares in only one way, i.e., 853776 + 435600 = 924^2 + 660^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 1289376.

It is not an unprimeable number, because it can be changed into a prime (1289371) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 34830 + ... + 34866.

2^1289376 is an apocalyptic number.

1289376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1289376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2069613).

1289376 is an abundant number, since it is smaller than the sum of its proper divisors (2849850).

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

1289376 is a wasteful number, since it uses less digits than its factorization.

1289376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75 (or 53 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 1289376 is about 1135.5069352496. The cubic root of 1289376 is about 108.8411681001.

The spelling of 1289376 in words is "one million, two hundred eighty-nine thousand, three hundred seventy-six".