123405351 has 4 divisors (see below), whose sum is σ = 164540472. Its totient is φ = 82270232.

The previous prime is 123405349. The next prime is 123405377. The reversal of 123405351 is 153504321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 123405351 - 2¹ = 123405349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123405311) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 20567556 + ... + 20567561.

It is an arithmetic number, because the mean of its divisors is an integer number (41135118).

Almost surely, 2^123405351 is an apocalyptic number.

123405351 is a deficient number, since it is larger than the sum of its proper divisors (41135121).

123405351 is an equidigital number, since it uses as much as digits as its factorization.

123405351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41135120.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 123405351 is about 11108.7961093901. The cubic root of 123405351 is about 497.8646952620.

Adding to 123405351 its reverse (153504321), we get a palindrome (276909672).

The spelling of 123405351 in words is "one hundred twenty-three million, four hundred five thousand, three hundred fifty-one".