139139025 has 12 divisors (see below), whose sum is σ = 230043312. Its totient is φ = 74207440.

The previous prime is 139139023. The next prime is 139139059. The reversal of 139139025 is 520931931.

It is not a de Polignac number, because 139139025 - 2¹ = 139139023 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139139023) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 927519 + ... + 927668.

It is an arithmetic number, because the mean of its divisors is an integer number (19170276).

Almost surely, 2^139139025 is an apocalyptic number.

139139025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139139025 is a deficient number, since it is larger than the sum of its proper divisors (90904287).

139139025 is a wasteful number, since it uses less digits than its factorization.

139139025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855200 (or 1855195 counting only the distinct ones).

The product of its (nonzero) digits is 7290, while the sum is 33.

The square root of 139139025 is about 11795.7206223274. The cubic root of 139139025 is about 518.1827902973.

The spelling of 139139025 in words is "one hundred thirty-nine million, one hundred thirty-nine thousand, twenty-five".