139660 has 12 divisors (see below), whose sum is σ = 293328. Its totient is φ = 55856.

The previous prime is 139627. The next prime is 139661. The reversal of 139660 is 66931.

It is not an unprimeable number, because it can be changed into a prime (139661) by changing a digit.

139660 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3472 + ... + 3511.

It is an arithmetic number, because the mean of its divisors is an integer number (24444).

2¹³⁹⁶⁶⁰ is an apocalyptic number.

139660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139660 is an abundant number, since it is smaller than the sum of its proper divisors (153668).

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

139660 is a wasteful number, since it uses less digits than its factorization.

139660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6992 (or 6990 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 139660 is about 373.7111183789. The cubic root of 139660 is about 51.8828724686.

The spelling of 139660 in words is "one hundred thirty-nine thousand, six hundred sixty".