123189045 has 32 divisors (see below), whose sum is σ = 228126720. Its totient is φ = 55598400.

The previous prime is 123189037. The next prime is 123189061. The reversal of 123189045 is 540981321.

It is not a de Polignac number, because 123189045 - 2³ = 123189037 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 123188997 and 123189015.

It is a congruent number.

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, 870 + ... + 15720.

It is an arithmetic number, because the mean of its divisors is an integer number (7128960).

Almost surely, 2^123189045 is an apocalyptic number.

123189045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123189045 is a deficient number, since it is larger than the sum of its proper divisors (104937675).

123189045 is a wasteful number, since it uses less digits than its factorization.

123189045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14945.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 123189045 is about 11099.0560409433. The cubic root of 123189045 is about 497.5736379135.

The spelling of 123189045 in words is "one hundred twenty-three million, one hundred eighty-nine thousand, forty-five".