125123210405 has 8 divisors (see below), whose sum is σ = 150151271712. Its totient is φ = 100096288848.

The previous prime is 125123210389. The next prime is 125123210477. The reversal of 125123210405 is 504012321521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125123210405 - 2⁴ = 125123210389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 21227 + ... + 500696.

It is an arithmetic number, because the mean of its divisors is an integer number (18768908964).

Almost surely, 2^125123210405 is an apocalyptic number.

It is an amenable number.

125123210405 is a deficient number, since it is larger than the sum of its proper divisors (25028061307).

125123210405 is an equidigital number, since it uses as much as digits as its factorization.

125123210405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569875.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 125123210405 its reverse (504012321521), we get a palindrome (629135531926).

The spelling of 125123210405 in words is "one hundred twenty-five billion, one hundred twenty-three million, two hundred ten thousand, four hundred five".