4927781 has 8 divisors (see below), whose sum is σ = 5072760. Its totient is φ = 4784832.

The previous prime is 4927777. The next prime is 4927787. The reversal of 4927781 is 1877294.

It can be written as a sum of positive squares in 4 ways, for example, as 538756 + 4389025 = 734^2 + 2095^2 .

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 4927781 - 2² = 4927777 is a prime.

It is a super-2 number, since 2×4927781² = 48566051167922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4927787) 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, 5351 + ... + 6203.

It is an arithmetic number, because the mean of its divisors is an integer number (634095).

Almost surely, 2^4927781 is an apocalyptic number.

It is an amenable number.

4927781 is a deficient number, since it is larger than the sum of its proper divisors (144979).

4927781 is a wasteful number, since it uses less digits than its factorization.

4927781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1015.

The product of its digits is 28224, while the sum is 38.

The square root of 4927781 is about 2219.8605812077. The cubic root of 4927781 is about 170.1703137440.

The spelling of 4927781 in words is "four million, nine hundred twenty-seven thousand, seven hundred eighty-one".