139996225 has 12 divisors (see below), whose sum is σ = 174072316. Its totient is φ = 111689280.

The previous prime is 139996211. The next prime is 139996229. The reversal of 139996225 is 522699931.

It is a Cunningham number, because it is equal to 11832²+1.

It can be written as a sum of positive squares in 6 ways, for example, as 1 + 139996224 = 1^2 + 11832^2 .

It is a de Polignac number, because none of the positive numbers 2^k-139996225 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139996229) 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, 1819 + ... + 16831.

Almost surely, 2^139996225 is an apocalyptic number.

It is an amenable number.

139996225 is a deficient number, since it is larger than the sum of its proper divisors (34076091).

139996225 is a wasteful number, since it uses less digits than its factorization.

139996225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15396 (or 15391 counting only the distinct ones).

The product of its digits is 262440, while the sum is 46.

The square root of 139996225 is about 11832.0000422583. Note that the first 4 decimals coincide. The cubic root of 139996225 is about 519.2447430800.

The spelling of 139996225 in words is "one hundred thirty-nine million, nine hundred ninety-six thousand, two hundred twenty-five".