123643025 has 24 divisors (see below), whose sum is σ = 169301664. Its totient is φ = 88822400.

The previous prime is 123643007. The next prime is 123643043. The reversal of 123643025 is 520346321.

It is an interprime number because it is at equal distance from previous prime (123643007) and next prime (123643043).

It is not a de Polignac number, because 123643025 - 2¹² = 123638929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123642985 and 123643003.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20117 + ... + 25533.

It is an arithmetic number, because the mean of its divisors is an integer number (7054236).

Almost surely, 2^123643025 is an apocalyptic number.

It is an amenable number.

123643025 is a deficient number, since it is larger than the sum of its proper divisors (45658639).

123643025 is a wasteful number, since it uses less digits than its factorization.

123643025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5521 (or 5516 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 123643025 is about 11119.4885224097. The cubic root of 123643025 is about 498.1841130932.

Adding to 123643025 its reverse (520346321), we get a palindrome (643989346).

The spelling of 123643025 in words is "one hundred twenty-three million, six hundred forty-three thousand, twenty-five".