1289472 has 72 divisors (see below), whose sum is σ = 3630144. Its totient is φ = 405504.

The previous prime is 1289459. The next prime is 1289513. The reversal of 1289472 is 2749821.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17628 + ... + 17700.

2^1289472 is an apocalyptic number.

1289472 is a gapful number since it is divisible by the number (12) 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 1289472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1815072).

1289472 is an abundant number, since it is smaller than the sum of its proper divisors (2340672).

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

1289472 is an equidigital number, since it uses as much as digits as its factorization.

1289472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 101 counting only the distinct ones).

The product of its digits is 8064, while the sum is 33.

The square root of 1289472 is about 1135.5492063315. The cubic root of 1289472 is about 108.8438692756.

The spelling of 1289472 in words is "one million, two hundred eighty-nine thousand, four hundred seventy-two".