139821120 has 112 divisors (see below), whose sum is σ = 493288320. Its totient is φ = 37283328.

The previous prime is 139821119. The next prime is 139821131. The reversal of 139821120 is 21128931.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 549 + ... + 16731.

It is an arithmetic number, because the mean of its divisors is an integer number (4404360).

Almost surely, 2^139821120 is an apocalyptic number.

139821120 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 139821120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246644160).

139821120 is an abundant number, since it is smaller than the sum of its proper divisors (353467200).

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

139821120 is a wasteful number, since it uses less digits than its factorization.

139821120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16209 (or 16193 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 139821120 is about 11824.5980904215. The cubic root of 139821120 is about 519.0281651326.

The spelling of 139821120 in words is "one hundred thirty-nine million, eight hundred twenty-one thousand, one hundred twenty".