123034505 has 16 divisors (see below), whose sum is σ = 166261248. Its totient is φ = 86592000.

The previous prime is 123034493. The next prime is 123034507. The reversal of 123034505 is 505430321.

It is not a de Polignac number, because 123034505 - 2⁴ = 123034489 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123034507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34376 + ... + 37785.

It is an arithmetic number, because the mean of its divisors is an integer number (10391328).

Almost surely, 2^123034505 is an apocalyptic number.

It is an amenable number.

123034505 is a deficient number, since it is larger than the sum of its proper divisors (43226743).

123034505 is a wasteful number, since it uses less digits than its factorization.

123034505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72208.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 123034505 is about 11092.0920028640. The cubic root of 123034505 is about 497.3654830210.

Adding to 123034505 its reverse (505430321), we get a palindrome (628464826).

The spelling of 123034505 in words is "one hundred twenty-three million, thirty-four thousand, five hundred five".