139426 has 16 divisors (see below), whose sum is σ = 249984. Its totient is φ = 57024.

The previous prime is 139423. The next prime is 139429. The reversal of 139426 is 624931.

It is an interprime number because it is at equal distance from previous prime (139423) and next prime (139429).

It is a self number, because there is not a number n which added to its sum of digits gives 139426.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139423) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 106 + ... + 538.

It is an arithmetic number, because the mean of its divisors is an integer number (15624).

2¹³⁹⁴²⁶ is an apocalyptic number.

139426 is a deficient number, since it is larger than the sum of its proper divisors (110558).

139426 is a wasteful number, since it uses less digits than its factorization.

139426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465.

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

The square root of 139426 is about 373.3979110815. The cubic root of 139426 is about 51.8538797267.

It can be divided in two parts, 139 and 426, that added together give a palindrome (565).

The spelling of 139426 in words is "one hundred thirty-nine thousand, four hundred twenty-six".