553861 has 8 divisors (see below), whose sum is σ = 690624. Its totient is φ = 431520.

The previous prime is 553849. The next prime is 553867. The reversal of 553861 is 168355.

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 553861 - 2⁷ = 553733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (553867) 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, 3520 + ... + 3673.

It is an arithmetic number, because the mean of its divisors is an integer number (86328).

2⁵⁵³⁸⁶¹ is an apocalyptic number.

It is an amenable number.

553861 is a deficient number, since it is larger than the sum of its proper divisors (136763).

553861 is a wasteful number, since it uses less digits than its factorization.

553861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7211.

The product of its digits is 3600, while the sum is 28.

The square root of 553861 is about 744.2183819283. The cubic root of 553861 is about 82.1234013513.

It can be divided in two parts, 55 and 3861, that added together give a triangular number (3916 = T₈₈).

The spelling of 553861 in words is "five hundred fifty-three thousand, eight hundred sixty-one".