139980 has 24 divisors (see below), whose sum is σ = 392112. Its totient is φ = 37312.

The previous prime is 139969. The next prime is 139981. The reversal of 139980 is 89931.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a plaindrome in base 16.

It is a zygodrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139980.

It is not an unprimeable number, because it can be changed into a prime (139981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1107 + ... + 1226.

It is an arithmetic number, because the mean of its divisors is an integer number (16338).

2¹³⁹⁹⁸⁰ is an apocalyptic number.

139980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139980 is an abundant number, since it is smaller than the sum of its proper divisors (252132).

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

139980 is a wasteful number, since it uses less digits than its factorization.

139980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2345 (or 2343 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 139980 is about 374.1390115986. The cubic root of 139980 is about 51.9224682845.

The spelling of 139980 in words is "one hundred thirty-nine thousand, nine hundred eighty".