139840925 has 12 divisors (see below), whose sum is σ = 198174816. Its totient is φ = 95890800.

The previous prime is 139840919. The next prime is 139840927. The reversal of 139840925 is 529048931.

It is not a de Polignac number, because 139840925 - 2⁸ = 139840669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139840927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 399371 + ... + 399720.

It is an arithmetic number, because the mean of its divisors is an integer number (16514568).

Almost surely, 2^139840925 is an apocalyptic number.

It is an amenable number.

139840925 is a deficient number, since it is larger than the sum of its proper divisors (58333891).

139840925 is an equidigital number, since it uses as much as digits as its factorization.

139840925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799108 (or 799103 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 139840925 is about 11825.4355099506. The cubic root of 139840925 is about 519.0526699368.

The spelling of 139840925 in words is "one hundred thirty-nine million, eight hundred forty thousand, nine hundred twenty-five".