4857641 has 4 divisors (see below), whose sum is σ = 4866132. Its totient is φ = 4849152.

The previous prime is 4857637. The next prime is 4857649. The reversal of 4857641 is 1467584.

Added to its reverse (1467584) it gives a square (6325225 = 2515²).

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 144400 + 4713241 = 380^2 + 2171^2 .

It is a cyclic number.

It is not a de Polignac number, because 4857641 - 2² = 4857637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4857649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3320 + ... + 4553.

It is an arithmetic number, because the mean of its divisors is an integer number (1216533).

Almost surely, 2^4857641 is an apocalyptic number.

It is an amenable number.

4857641 is a deficient number, since it is larger than the sum of its proper divisors (8491).

4857641 is an equidigital number, since it uses as much as digits as its factorization.

4857641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8490.

The product of its digits is 26880, while the sum is 35.

The square root of 4857641 is about 2204.0056714991. The cubic root of 4857641 is about 169.3590745410.

Adding to 4857641 its reverse (1467584), we get a square (6325225 = 2515²).

The spelling of 4857641 in words is "four million, eight hundred fifty-seven thousand, six hundred forty-one".