139402 has 8 divisors (see below), whose sum is σ = 213696. Its totient is φ = 68172.

The previous prime is 139397. The next prime is 139409. The reversal of 139402 is 204931.

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

It is a self number, because there is not a number n which added to its sum of digits gives 139402.

It is not an unprimeable number, because it can be changed into a prime (139409) by changing a digit.

139402 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 648 + ... + 835.

It is an arithmetic number, because the mean of its divisors is an integer number (26712).

2¹³⁹⁴⁰² is an apocalyptic number.

139402 is a deficient number, since it is larger than the sum of its proper divisors (74294).

139402 is a wasteful number, since it uses less digits than its factorization.

139402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 139402 is about 373.3657724002. The cubic root of 139402 is about 51.8509042785.

The spelling of 139402 in words is "one hundred thirty-nine thousand, four hundred two".