123240025 has 12 divisors (see below), whose sum is σ = 154972224. Its totient is φ = 97202000.

The previous prime is 123240011. The next prime is 123240043. The reversal of 123240025 is 520042321.

It is not a de Polignac number, because 123240025 - 2⁵ = 123239993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123239984 and 123240011.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32941 + ... + 36490.

It is an arithmetic number, because the mean of its divisors is an integer number (12914352).

Almost surely, 2^123240025 is an apocalyptic number.

It is an amenable number.

123240025 is a deficient number, since it is larger than the sum of its proper divisors (31732199).

123240025 is an equidigital number, since it uses as much as digits as its factorization.

123240025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69512 (or 69507 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 123240025 is about 11101.3523950913. The cubic root of 123240025 is about 497.6422663257.

Adding to 123240025 its reverse (520042321), we get a palindrome (643282346).

The spelling of 123240025 in words is "one hundred twenty-three million, two hundred forty thousand, twenty-five".