4772781 has 36 divisors (see below), whose sum is σ = 7904988. Its totient is φ = 2757888.

The previous prime is 4772771. The next prime is 4772797. The reversal of 4772781 is 1872774.

4772781 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 324900 + 4447881 = 570^2 + 2109^2 .

It is not a de Polignac number, because 4772781 - 2⁶ = 4772717 is a prime.

It is a super-2 number, since 2×4772781² = 45558876947922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4772731) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 42181 + ... + 42293.

It is an arithmetic number, because the mean of its divisors is an integer number (219583).

Almost surely, 2^4772781 is an apocalyptic number.

It is an amenable number.

4772781 is a deficient number, since it is larger than the sum of its proper divisors (3132207).

4772781 is a wasteful number, since it uses less digits than its factorization.

4772781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 148 counting only the distinct ones).

The product of its digits is 21952, while the sum is 36.

The square root of 4772781 is about 2184.6695402280. The cubic root of 4772781 is about 168.3670757659.

The spelling of 4772781 in words is "four million, seven hundred seventy-two thousand, seven hundred eighty-one".