139521874 has 8 divisors (see below), whose sum is σ = 209591280. Its totient is φ = 69658116.

The previous prime is 139521869. The next prime is 139521881. The reversal of 139521874 is 478125931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49704 + ... + 52435.

It is an arithmetic number, because the mean of its divisors is an integer number (26198910).

Almost surely, 2^139521874 is an apocalyptic number.

139521874 is a deficient number, since it is larger than the sum of its proper divisors (70069406).

139521874 is a wasteful number, since it uses less digits than its factorization.

139521874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102824.

The product of its digits is 60480, while the sum is 40.

The square root of 139521874 is about 11811.9377749800. The cubic root of 139521874 is about 518.6576249315.

The spelling of 139521874 in words is "one hundred thirty-nine million, five hundred twenty-one thousand, eight hundred seventy-four".