505654 has 4 divisors (see below), whose sum is σ = 758484. Its totient is φ = 252826.

The previous prime is 505643. The next prime is 505657. The reversal of 505654 is 456505.

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

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126412 + ... + 126415.

It is an arithmetic number, because the mean of its divisors is an integer number (189621).

2⁵⁰⁵⁶⁵⁴ is an apocalyptic number.

505654 is a deficient number, since it is larger than the sum of its proper divisors (252830).

505654 is a wasteful number, since it uses less digits than its factorization.

505654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252829.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 505654 is about 711.0935240881. The cubic root of 505654 is about 79.6681041350.

The spelling of 505654 in words is "five hundred five thousand, six hundred fifty-four".