547861 has 4 divisors (see below), whose sum is σ = 558252. Its totient is φ = 537472.

The previous prime is 547853. The next prime is 547871. The reversal of 547861 is 168745.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 168745 = 5 ⋅33749.

It can be written as a sum of positive squares in 2 ways, for example, as 180625 + 367236 = 425^2 + 606^2 .

It is a cyclic number.

It is not a de Polignac number, because 547861 - 2³ = 547853 is a prime.

It is a Duffinian number.

547861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (547831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5116 + ... + 5221.

It is an arithmetic number, because the mean of its divisors is an integer number (139563).

2⁵⁴⁷⁸⁶¹ is an apocalyptic number.

It is an amenable number.

547861 is a deficient number, since it is larger than the sum of its proper divisors (10391).

547861 is a wasteful number, since it uses less digits than its factorization.

547861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10390.

The product of its digits is 6720, while the sum is 31.

The square root of 547861 is about 740.1763303430. The cubic root of 547861 is about 81.8257752399.

The spelling of 547861 in words is "five hundred forty-seven thousand, eight hundred sixty-one".