505951 has 8 divisors (see below), whose sum is σ = 550400. Its totient is φ = 463320.

The previous prime is 505949. The next prime is 505961. The reversal of 505951 is 159505.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 505951 - 2¹ = 505949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505961) 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 in 7 ways as a sum of consecutive naturals, for example, 160 + ... + 1018.

It is an arithmetic number, because the mean of its divisors is an integer number (68800).

2⁵⁰⁵⁹⁵¹ is an apocalyptic number.

505951 is a deficient number, since it is larger than the sum of its proper divisors (44449).

505951 is a wasteful number, since it uses less digits than its factorization.

505951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909.

The product of its (nonzero) digits is 1125, while the sum is 25.

The square root of 505951 is about 711.3023267219. The cubic root of 505951 is about 79.6836989857.

The spelling of 505951 in words is "five hundred five thousand, nine hundred fifty-one".