5716781 has 10 divisors (see below), whose sum is σ = 6671982. Its totient is φ = 4898040.

The previous prime is 5716771. The next prime is 5716787. The reversal of 5716781 is 1876175.

It can be written as a sum of positive squares in only one way, i.e., 2941225 + 2775556 = 1715^2 + 1666^2 .

It is not a de Polignac number, because 5716781 - 2⁶ = 5716717 is a prime.

It is a super-2 number, since 2×5716781² = 65363170003922, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5716787) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1211 + ... + 3591.

Almost surely, 2^5716781 is an apocalyptic number.

It is an amenable number.

5716781 is a deficient number, since it is larger than the sum of its proper divisors (955201).

5716781 is an frugal number, since it uses more digits than its factorization.

5716781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2409 (or 2388 counting only the distinct ones).

The product of its digits is 11760, while the sum is 35.

The square root of 5716781 is about 2390.9790881561. The cubic root of 5716781 is about 178.8067262541.

Subtracting from 5716781 its reverse (1876175), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 5716781 in words is "five million, seven hundred sixteen thousand, seven hundred eighty-one".