123454805 has 6 divisors (see below), whose sum is σ = 148175586. Its totient is φ = 98743968.

The previous prime is 123454691. The next prime is 123454883. The reversal of 123454805 is 508454321.

It can be written as a sum of positive squares in 3 ways, for example, as 484 + 123454321 = 22^2 + 11111^2 .

It is a de Polignac number, because none of the positive numbers 2^k-123454805 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22361 + ... + 27329.

It is an arithmetic number, because the mean of its divisors is an integer number (24695931).

Almost surely, 2^123454805 is an apocalyptic number.

It is an amenable number.

123454805 is a deficient number, since it is larger than the sum of its proper divisors (24720781).

123454805 is an frugal number, since it uses more digits than its factorization.

123454805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9943 (or 4974 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 32.

The square root of 123454805 is about 11111.0217801965. The cubic root of 123454805 is about 497.9311918718.

The spelling of 123454805 in words is "one hundred twenty-three million, four hundred fifty-four thousand, eight hundred five".