1289384 has 16 divisors (see below), whose sum is σ = 2464020. Its totient is φ = 632320.

The previous prime is 1289381. The next prime is 1289401. The reversal of 1289384 is 4839821.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1060900 + 228484 = 1030^2 + 478^2 .

It is a super-2 number, since 2×1289384² = 3325022198912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1289381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1097 + ... + 1944.

2^1289384 is an apocalyptic number.

It is an amenable number.

1289384 is a deficient number, since it is larger than the sum of its proper divisors (1174636).

1289384 is a wasteful number, since it uses less digits than its factorization.

1289384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3100 (or 3096 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 1289384 is about 1135.5104578999. The cubic root of 1289384 is about 108.8413932032.

The spelling of 1289384 in words is "one million, two hundred eighty-nine thousand, three hundred eighty-four".