1359639 has 16 divisors (see below), whose sum is σ = 2070240. Its totient is φ = 881280.

The previous prime is 1359619. The next prime is 1359641. The reversal of 1359639 is 9369531.

1359639 is a `hidden beast` number, since 13 + 5 + 9 + 639 = 666.

It is not a de Polignac number, because 1359639 - 2¹⁶ = 1294103 is a prime.

1359639 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1359619) 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, 319 + ... + 1679.

It is an arithmetic number, because the mean of its divisors is an integer number (129390).

2^1359639 is an apocalyptic number.

1359639 is a deficient number, since it is larger than the sum of its proper divisors (710601).

1359639 is a wasteful number, since it uses less digits than its factorization.

1359639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1407 (or 1401 counting only the distinct ones).

The product of its digits is 21870, while the sum is 36.

The square root of 1359639 is about 1166.0355912235. The cubic root of 1359639 is about 110.7833612449.

The spelling of 1359639 in words is "one million, three hundred fifty-nine thousand, six hundred thirty-nine".