4720781 has 16 divisors (see below), whose sum is σ = 5524848. Its totient is φ = 3993600.

The previous prime is 4720777. The next prime is 4720787. The reversal of 4720781 is 1870274.

It can be written as a sum of positive squares in 8 ways, for example, as 855625 + 3865156 = 925^2 + 1966^2 .

It is not a de Polignac number, because 4720781 - 2² = 4720777 is a prime.

It is a super-2 number, since 2×4720781² = 44571546499922, 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 (4720787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8801 + ... + 9321.

It is an arithmetic number, because the mean of its divisors is an integer number (345303).

Almost surely, 2^4720781 is an apocalyptic number.

4720781 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4720781 is a deficient number, since it is larger than the sum of its proper divisors (804067).

4720781 is a wasteful number, since it uses less digits than its factorization.

4720781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 4720781 is about 2172.7358329995. The cubic root of 4720781 is about 167.7533820094.

The spelling of 4720781 in words is "four million, seven hundred twenty thousand, seven hundred eighty-one".