4912781 has 2 divisors, whose sum is σ = 4912782. Its totient is φ = 4912780.

The previous prime is 4912771. The next prime is 4912807. The reversal of 4912781 is 1872194.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3553225 + 1359556 = 1885^2 + 1166^2 .

It is a cyclic number.

It is not a de Polignac number, because 4912781 - 2⁶ = 4912717 is a prime.

It is a super-2 number, since 2×4912781² = 48270834307922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4912751) 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, 2456390 + 2456391.

It is an arithmetic number, because the mean of its divisors is an integer number (2456391).

Almost surely, 2^4912781 is an apocalyptic number.

It is an amenable number.

4912781 is a deficient number, since it is larger than the sum of its proper divisors (1).

4912781 is an equidigital number, since it uses as much as digits as its factorization.

4912781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 32.

The square root of 4912781 is about 2216.4794156500. The cubic root of 4912781 is about 169.9974740109.

The spelling of 4912781 in words is "four million, nine hundred twelve thousand, seven hundred eighty-one".