125123405 has 8 divisors (see below), whose sum is σ = 163797984. Its totient is φ = 90998800.

The previous prime is 125123357. The next prime is 125123437. The reversal of 125123405 is 504321521.

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

It is not a de Polignac number, because 125123405 - 2⁸ = 125123149 is a prime.

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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1137431 + ... + 1137540.

It is an arithmetic number, because the mean of its divisors is an integer number (20474748).

Almost surely, 2^125123405 is an apocalyptic number.

It is an amenable number.

125123405 is a deficient number, since it is larger than the sum of its proper divisors (38674579).

125123405 is a wasteful number, since it uses less digits than its factorization.

125123405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2274987.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 125123405 is about 11185.8573654414. The cubic root of 125123405 is about 500.1644858829.

Adding to 125123405 its reverse (504321521), we get a palindrome (629444926).

The spelling of 125123405 in words is "one hundred twenty-five million, one hundred twenty-three thousand, four hundred five".