4780861 has 2 divisors, whose sum is σ = 4780862. Its totient is φ = 4780860.

The previous prime is 4780823. The next prime is 4780871. The reversal of 4780861 is 1680874.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4687225 + 93636 = 2165^2 + 306^2 .

It is a cyclic number.

It is not a de Polignac number, because 4780861 - 2¹⁹ = 4256573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4780871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2390430 + 2390431.

It is an arithmetic number, because the mean of its divisors is an integer number (2390431).

Almost surely, 2^4780861 is an apocalyptic number.

It is an amenable number.

4780861 is a deficient number, since it is larger than the sum of its proper divisors (1).

4780861 is an equidigital number, since it uses as much as digits as its factorization.

4780861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 4780861 is about 2186.5180081582. The cubic root of 4780861 is about 168.4620336113.

It can be divided in two parts, 47 and 80861, that added together give a palindrome (80908).

The spelling of 4780861 in words is "four million, seven hundred eighty thousand, eight hundred sixty-one".