139648 has 16 divisors (see below), whose sum is σ = 278460. Its totient is φ = 69760.

The previous prime is 139627. The next prime is 139661. The reversal of 139648 is 846931.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

139648 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 as a sum of consecutive naturals, namely, 418 + ... + 673.

2¹³⁹⁶⁴⁸ is an apocalyptic number.

It is an amenable number.

139648 is a deficient number, since it is larger than the sum of its proper divisors (138812).

139648 is an equidigital number, since it uses as much as digits as its factorization.

139648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105 (or 1093 counting only the distinct ones).

The product of its digits is 5184, while the sum is 31.

The square root of 139648 is about 373.6950628521. The cubic root of 139648 is about 51.8813864494.

It can be divided in two parts, 1396 and 48, that added together give a square (1444 = 38²).

The spelling of 139648 in words is "one hundred thirty-nine thousand, six hundred forty-eight".