139020 has 48 divisors (see below), whose sum is σ = 446208. Its totient is φ = 31680.

The previous prime is 138977. The next prime is 139021. The reversal of 139020 is 20931.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (139021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255 + ... + 585.

It is an arithmetic number, because the mean of its divisors is an integer number (9296).

2¹³⁹⁰²⁰ is an apocalyptic number.

139020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223104).

139020 is an abundant number, since it is smaller than the sum of its proper divisors (307188).

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

139020 is a wasteful number, since it uses less digits than its factorization.

139020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 139020 is about 372.8538587704. The cubic root of 139020 is about 51.8034990158.

Adding to 139020 its reverse (20931), we get a palindrome (159951).

The spelling of 139020 in words is "one hundred thirty-nine thousand, twenty".