4020847 has 2 divisors, whose sum is σ = 4020848. Its totient is φ = 4020846.

The previous prime is 4020833. The next prime is 4020869. The reversal of 4020847 is 7480204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4020847 - 2⁷ = 4020719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4029847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010423 + 2010424.

It is an arithmetic number, because the mean of its divisors is an integer number (2010424).

Almost surely, 2^4020847 is an apocalyptic number.

4020847 is a deficient number, since it is larger than the sum of its proper divisors (1).

4020847 is an equidigital number, since it uses as much as digits as its factorization.

4020847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 4020847 is about 2005.2049770535. The cubic root of 4020847 is about 159.0153987433.

The spelling of 4020847 in words is "four million, twenty thousand, eight hundred forty-seven".