139921580 has 12 divisors (see below), whose sum is σ = 293835360. Its totient is φ = 55968624.

The previous prime is 139921571. The next prime is 139921591. The reversal of 139921580 is 85129931.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3498020 + ... + 3498059.

It is an arithmetic number, because the mean of its divisors is an integer number (24486280).

Almost surely, 2^139921580 is an apocalyptic number.

139921580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139921580 is an abundant number, since it is smaller than the sum of its proper divisors (153913780).

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

139921580 is a wasteful number, since it uses less digits than its factorization.

139921580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6996088 (or 6996086 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 139921580 is about 11828.8452521791. The cubic root of 139921580 is about 519.1524407946.

The spelling of 139921580 in words is "one hundred thirty-nine million, nine hundred twenty-one thousand, five hundred eighty".