553985 has 8 divisors (see below), whose sum is σ = 671976. Its totient is φ = 438400.

The previous prime is 553981. The next prime is 553991. The reversal of 553985 is 589355.

It can be written as a sum of positive squares in 4 ways, for example, as 128881 + 425104 = 359^2 + 652^2 .

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

It is not a de Polignac number, because 553985 - 2² = 553981 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (553981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44 + ... + 1053.

It is an arithmetic number, because the mean of its divisors is an integer number (83997).

It is a Proth number, since it is equal to 541 ⋅ 2¹⁰ + 1 and 541 < 2¹⁰.

2⁵⁵³⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

553985 is a deficient number, since it is larger than the sum of its proper divisors (117991).

553985 is a wasteful number, since it uses less digits than its factorization.

553985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1203.

The product of its digits is 27000, while the sum is 35.

The square root of 553985 is about 744.3016861461. The cubic root of 553985 is about 82.1295295688.

The spelling of 553985 in words is "five hundred fifty-three thousand, nine hundred eighty-five".