123140025 has 36 divisors (see below), whose sum is σ = 222625260. Its totient is φ = 65059200.

The previous prime is 123140011. The next prime is 123140063. The reversal of 123140025 is 520041321.

It can be written as a sum of positive squares in 6 ways, for example, as 4678569 + 118461456 = 2163^2 + 10884^2 .

It is not a de Polignac number, because 123140025 - 2⁷ = 123139897 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 22015 + ... + 27035.

It is an arithmetic number, because the mean of its divisors is an integer number (6184035).

Almost surely, 2^123140025 is an apocalyptic number.

123140025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123140025 is a deficient number, since it is larger than the sum of its proper divisors (99485235).

123140025 is a wasteful number, since it uses less digits than its factorization.

123140025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5146 (or 5138 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 123140025 is about 11096.8475253110. The cubic root of 123140025 is about 497.5076301617.

Adding to 123140025 its reverse (520041321), we get a palindrome (643181346).

The spelling of 123140025 in words is "one hundred twenty-three million, one hundred forty thousand, twenty-five".