139497825 has 12 divisors (see below), whose sum is σ = 230636528. Its totient is φ = 74398800.

The previous prime is 139497821. The next prime is 139497857. The reversal of 139497825 is 528794931.

It is not a de Polignac number, because 139497825 - 2² = 139497821 is a prime.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139497821) 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, 929911 + ... + 930060.

Almost surely, 2^139497825 is an apocalyptic number.

139497825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139497825 is a deficient number, since it is larger than the sum of its proper divisors (91138703).

139497825 is a wasteful number, since it uses less digits than its factorization.

139497825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1859984 (or 1859979 counting only the distinct ones).

The product of its digits is 544320, while the sum is 48.

The square root of 139497825 is about 11810.9197355667. The cubic root of 139497825 is about 518.6278233585.

The spelling of 139497825 in words is "one hundred thirty-nine million, four hundred ninety-seven thousand, eight hundred twenty-five".