123210525 has 12 divisors (see below), whose sum is σ = 203708192. Its totient is φ = 65712240.

The previous prime is 123210499. The next prime is 123210541. The reversal of 123210525 is 525012321.

It is not a de Polignac number, because 123210525 - 2⁷ = 123210397 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 821329 + ... + 821478.

Almost surely, 2^123210525 is an apocalyptic number.

123210525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123210525 is a deficient number, since it is larger than the sum of its proper divisors (80497667).

123210525 is a wasteful number, since it uses less digits than its factorization.

123210525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642820 (or 1642815 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 123210525 is about 11100.0236486235. The cubic root of 123210525 is about 497.6025562333.

Adding to 123210525 its reverse (525012321), we get a palindrome (648222846).

The spelling of 123210525 in words is "one hundred twenty-three million, two hundred ten thousand, five hundred twenty-five".