123405134 has 8 divisors (see below), whose sum is σ = 186047928. Its totient is φ = 61389160.

The previous prime is 123405083. The next prime is 123405157. The reversal of 123405134 is 431504321.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156212 + ... + 156999.

It is an arithmetic number, because the mean of its divisors is an integer number (23255991).

Almost surely, 2^123405134 is an apocalyptic number.

123405134 is a deficient number, since it is larger than the sum of its proper divisors (62642794).

123405134 is a wasteful number, since it uses less digits than its factorization.

123405134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313410.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 123405134 is about 11108.7863423508. The cubic root of 123405134 is about 497.8644034413.

Adding to 123405134 its reverse (431504321), we get a palindrome (554909455).

The spelling of 123405134 in words is "one hundred twenty-three million, four hundred five thousand, one hundred thirty-four".