139642 has 4 divisors (see below), whose sum is σ = 209466. Its totient is φ = 69820.

The previous prime is 139627. The next prime is 139661. The reversal of 139642 is 246931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 136161 + 3481 = 369^2 + 59^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34909 + ... + 34912.

2¹³⁹⁶⁴² is an apocalyptic number.

139642 is a deficient number, since it is larger than the sum of its proper divisors (69824).

139642 is an equidigital number, since it uses as much as digits as its factorization.

139642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69823.

The product of its digits is 1296, while the sum is 25.

The square root of 139642 is about 373.6870348299. The cubic root of 139642 is about 51.8806434079.

The spelling of 139642 in words is "one hundred thirty-nine thousand, six hundred forty-two".