505454123 has 4 divisors (see below), whose sum is σ = 507623688. Its totient is φ = 503284560.

The previous prime is 505454107. The next prime is 505454161. The reversal of 505454123 is 321454505.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 505454123 - 2⁴ = 505454107 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 (505454423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1084433 + ... + 1084898.

It is an arithmetic number, because the mean of its divisors is an integer number (126905922).

Almost surely, 2^505454123 is an apocalyptic number.

505454123 is a deficient number, since it is larger than the sum of its proper divisors (2169565).

505454123 is a wasteful number, since it uses less digits than its factorization.

505454123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2169564.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 505454123 is about 22482.3068878618. The cubic root of 505454123 is about 796.5760557259.

The spelling of 505454123 in words is "five hundred five million, four hundred fifty-four thousand, one hundred twenty-three".