505898 has 4 divisors (see below), whose sum is σ = 758850. Its totient is φ = 252948.

The previous prime is 505877. The next prime is 505907. The reversal of 505898 is 898505.

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

It can be written as a sum of positive squares in only one way, i.e., 444889 + 61009 = 667^2 + 247^2 .

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

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 505898.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126473 + ... + 126476.

2⁵⁰⁵⁸⁹⁸ is an apocalyptic number.

505898 is a deficient number, since it is larger than the sum of its proper divisors (252952).

505898 is a wasteful number, since it uses less digits than its factorization.

505898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252951.

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 505898 is about 711.2650701391. The cubic root of 505898 is about 79.6809165137.

The spelling of 505898 in words is "five hundred five thousand, eight hundred ninety-eight".