245606138 has 4 divisors (see below), whose sum is σ = 368409210. Its totient is φ = 122803068.

The previous prime is 245606131. The next prime is 245606171. The reversal of 245606138 is 831606542.

245606138 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 141300769 + 104305369 = 11887^2 + 10213^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 245606098 and 245606107.

It is not an unprimeable number, because it can be changed into a prime (245606131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61401533 + ... + 61401536.

Almost surely, 2^245606138 is an apocalyptic number.

245606138 is a deficient number, since it is larger than the sum of its proper divisors (122803072).

245606138 is a wasteful number, since it uses less digits than its factorization.

245606138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122803071.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 245606138 is about 15671.8262496749. The cubic root of 245606138 is about 626.2480771200.

The spelling of 245606138 in words is "two hundred forty-five million, six hundred six thousand, one hundred thirty-eight".