4812781 has 4 divisors (see below), whose sum is σ = 4968064. Its totient is φ = 4657500.

The previous prime is 4812779. The next prime is 4812791. The reversal of 4812781 is 1872184.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4812781 - 2¹ = 4812779 is a prime.

It is a super-3 number, since 3×4812781³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 155251 = 4812781 / (4 + 8 + 1 + 2 + 7 + 8 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4812721) 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, 77595 + ... + 77656.

It is an arithmetic number, because the mean of its divisors is an integer number (1242016).

Almost surely, 2^4812781 is an apocalyptic number.

It is an amenable number.

4812781 is a deficient number, since it is larger than the sum of its proper divisors (155283).

4812781 is a wasteful number, since it uses less digits than its factorization.

4812781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155282.

The product of its digits is 3584, while the sum is 31.

The square root of 4812781 is about 2193.8051417571. The cubic root of 4812781 is about 168.8361213812.

The spelling of 4812781 in words is "four million, eight hundred twelve thousand, seven hundred eighty-one".