4287781 has 2 divisors, whose sum is σ = 4287782. Its totient is φ = 4287780.

The previous prime is 4287769. The next prime is 4287793. The reversal of 4287781 is 1877824.

It is a balanced prime because it is at equal distance from previous prime (4287769) and next prime (4287793).

It can be written as a sum of positive squares in only one way, i.e., 3204100 + 1083681 = 1790^2 + 1041^2 .

It is a cyclic number.

It is not a de Polignac number, because 4287781 - 2¹³ = 4279589 is a prime.

It is a super-2 number, since 2×4287781² = 36770131807922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4287781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4287721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2143890 + 2143891.

It is an arithmetic number, because the mean of its divisors is an integer number (2143891).

Almost surely, 2^4287781 is an apocalyptic number.

It is an amenable number.

4287781 is a deficient number, since it is larger than the sum of its proper divisors (1).

4287781 is an equidigital number, since it uses as much as digits as its factorization.

4287781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25088, while the sum is 37.

The square root of 4287781 is about 2070.6957767862. The cubic root of 4287781 is about 162.4591581777.

The spelling of 4287781 in words is "four million, two hundred eighty-seven thousand, seven hundred eighty-one".