123905745 has 48 divisors (see below), whose sum is σ = 227285760. Its totient is φ = 62270208.

The previous prime is 123905737. The next prime is 123905767. The reversal of 123905745 is 547509321.

It is not a de Polignac number, because 123905745 - 2³ = 123905737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 267384 + ... + 267846.

It is an arithmetic number, because the mean of its divisors is an integer number (4735120).

Almost surely, 2^123905745 is an apocalyptic number.

123905745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123905745 is a deficient number, since it is larger than the sum of its proper divisors (103380015).

123905745 is a wasteful number, since it uses less digits than its factorization.

123905745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806 (or 803 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 123905745 is about 11131.2957466775. The cubic root of 123905745 is about 498.5367151056.

The spelling of 123905745 in words is "one hundred twenty-three million, nine hundred five thousand, seven hundred forty-five".