139601 has 16 divisors (see below), whose sum is σ = 182400. Its totient is φ = 105840.

The previous prime is 139597. The next prime is 139609. The reversal of 139601 is 106931.

It is not a de Polignac number, because 139601 - 2² = 139597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139601.

It is not an unprimeable number, because it can be changed into a prime (139609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3755 + ... + 3791.

It is an arithmetic number, because the mean of its divisors is an integer number (11400).

2¹³⁹⁶⁰¹ is an apocalyptic number.

139601 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

139601 is a deficient number, since it is larger than the sum of its proper divisors (42799).

139601 is an equidigital number, since it uses as much as digits as its factorization.

139601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69 (or 55 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 139601 is about 373.6321720623. The cubic root of 139601 is about 51.8755653879.

The spelling of 139601 in words is "one hundred thirty-nine thousand, six hundred one".