139420 has 12 divisors (see below), whose sum is σ = 292824. Its totient is φ = 55760.

The previous prime is 139409. The next prime is 139423. The reversal of 139420 is 24931.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3466 + ... + 3505.

It is an arithmetic number, because the mean of its divisors is an integer number (24402).

2¹³⁹⁴²⁰ is an apocalyptic number.

139420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139420 is an abundant number, since it is smaller than the sum of its proper divisors (153404).

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

139420 is a wasteful number, since it uses less digits than its factorization.

139420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6980 (or 6978 counting only the distinct ones).

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

The square root of 139420 is about 373.3898766705. The cubic root of 139420 is about 51.8531358966.

The spelling of 139420 in words is "one hundred thirty-nine thousand, four hundred twenty".