139565 has 8 divisors (see below), whose sum is σ = 169728. Its totient is φ = 110160.

The previous prime is 139547. The next prime is 139571. The reversal of 139565 is 565931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 139565 - 2⁶ = 139501 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 380 + ... + 650.

It is an arithmetic number, because the mean of its divisors is an integer number (21216).

2¹³⁹⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

139565 is a deficient number, since it is larger than the sum of its proper divisors (30163).

139565 is a wasteful number, since it uses less digits than its factorization.

139565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379.

The product of its digits is 4050, while the sum is 29.

The square root of 139565 is about 373.5839932331. The cubic root of 139565 is about 51.8711058189.

The spelling of 139565 in words is "one hundred thirty-nine thousand, five hundred sixty-five".