123434545 has 32 divisors (see below), whose sum is σ = 169948800. Its totient is φ = 85307904.

The previous prime is 123434503. The next prime is 123434551. The reversal of 123434545 is 545434321.

123434545 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It is a cyclic number.

It is not a de Polignac number, because 123434545 - 2⁷ = 123434417 is a prime.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 109354 + ... + 110476.

It is an arithmetic number, because the mean of its divisors is an integer number (5310900).

Almost surely, 2^123434545 is an apocalyptic number.

It is an amenable number.

123434545 is a deficient number, since it is larger than the sum of its proper divisors (46514255).

123434545 is a wasteful number, since it uses less digits than its factorization.

123434545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249.

The product of its digits is 28800, while the sum is 31.

The square root of 123434545 is about 11110.1100354587. The cubic root of 123434545 is about 497.9039521116.

Adding to 123434545 its reverse (545434321), we get a palindrome (668868866).

The spelling of 123434545 in words is "one hundred twenty-three million, four hundred thirty-four thousand, five hundred forty-five".