405432123 has 4 divisors (see below), whose sum is σ = 540576168. Its totient is φ = 270288080.

The previous prime is 405432103. The next prime is 405432143. The reversal of 405432123 is 321234504.

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

It is an interprime number because it is at equal distance from previous prime (405432103) and next prime (405432143).

It is a cyclic number.

It is not a de Polignac number, because 405432123 - 2⁶ = 405432059 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 405432093 and 405432102.

It is not an unprimeable number, because it can be changed into a prime (405432103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67572018 + ... + 67572023.

It is an arithmetic number, because the mean of its divisors is an integer number (135144042).

Almost surely, 2^405432123 is an apocalyptic number.

405432123 is a deficient number, since it is larger than the sum of its proper divisors (135144045).

405432123 is a wasteful number, since it uses less digits than its factorization.

405432123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135144044.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 405432123 is about 20135.3451174794. The cubic root of 405432123 is about 740.1266662890.

Adding to 405432123 its reverse (321234504), we get a palindrome (726666627).

The spelling of 405432123 in words is "four hundred five million, four hundred thirty-two thousand, one hundred twenty-three".