139021125 has 16 divisors (see below), whose sum is σ = 231331776. Its totient is φ = 74144400.

The previous prime is 139021123. The next prime is 139021139. The reversal of 139021125 is 521120931.

It is not a de Polignac number, because 139021125 - 2¹ = 139021123 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 139021095 and 139021104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139021123) 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 15 ways as a sum of consecutive naturals, for example, 184987 + ... + 185736.

It is an arithmetic number, because the mean of its divisors is an integer number (14458236).

Almost surely, 2^139021125 is an apocalyptic number.

139021125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139021125 is a deficient number, since it is larger than the sum of its proper divisors (92310651).

139021125 is an equidigital number, since it uses as much as digits as its factorization.

139021125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370741 (or 370731 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 139021125 is about 11790.7219880718. The cubic root of 139021125 is about 518.0363875295.

The spelling of 139021125 in words is "one hundred thirty-nine million, twenty-one thousand, one hundred twenty-five".