5861781 has 16 divisors (see below), whose sum is σ = 8769600. Its totient is φ = 3869424.

The previous prime is 5861777. The next prime is 5861789. The reversal of 5861781 is 1871685.

5861781 is a `hidden beast` number, since 586 + 1 + 78 + 1 = 666.

It is not a de Polignac number, because 5861781 - 2² = 5861777 is a prime.

It is a super-2 number, since 2×5861781² = 68720952983922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5861789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1875 + ... + 3903.

It is an arithmetic number, because the mean of its divisors is an integer number (548100).

Almost surely, 2^5861781 is an apocalyptic number.

It is an amenable number.

5861781 is a deficient number, since it is larger than the sum of its proper divisors (2907819).

5861781 is a wasteful number, since it uses less digits than its factorization.

5861781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2145 (or 2139 counting only the distinct ones).

The product of its digits is 13440, while the sum is 36.

The square root of 5861781 is about 2421.1115215950. Note that the first 3 decimals coincide. The cubic root of 5861781 is about 180.3058688403.

The spelling of 5861781 in words is "five million, eight hundred sixty-one thousand, seven hundred eighty-one".