139281250 has 28 divisors (see below), whose sum is σ = 261207594. Its totient is φ = 55700000.

The previous prime is 139281217. The next prime is 139281253. The reversal of 139281250 is 52182931.

139281250 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 7 ways, for example, as 59768361 + 79512889 = 7731^2 + 8917^2 .

It is not an unprimeable number, because it can be changed into a prime (139281253) by changing a digit.

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 13 ways as a sum of consecutive naturals, for example, 29022 + ... + 33478.

Almost surely, 2^139281250 is an apocalyptic number.

139281250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139281250 is a deficient number, since it is larger than the sum of its proper divisors (121926344).

139281250 is an frugal number, since it uses more digits than its factorization.

139281250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4489 (or 4464 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 139281250 is about 11801.7477519222. The cubic root of 139281250 is about 518.3592887085.

The spelling of 139281250 in words is "one hundred thirty-nine million, two hundred eighty-one thousand, two hundred fifty".