1365984 has 120 divisors (see below), whose sum is σ = 4390848. Its totient is φ = 414720.

The previous prime is 1365983. The next prime is 1366009. The reversal of 1365984 is 4895631.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1365983) 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 19 ways as a sum of consecutive naturals, for example, 44049 + ... + 44079.

2^1365984 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 1365984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2195424).

1365984 is an abundant number, since it is smaller than the sum of its proper divisors (3024864).

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

1365984 is a wasteful number, since it uses less digits than its factorization.

1365984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70 (or 53 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 1365984 is about 1168.7531818139. The cubic root of 1365984 is about 110.9554240298.

The spelling of 1365984 in words is "one million, three hundred sixty-five thousand, nine hundred eighty-four".