4878121 has 2 divisors, whose sum is σ = 4878122. Its totient is φ = 4878120.

The previous prime is 4878113. The next prime is 4878149. The reversal of 4878121 is 1218784.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4665600 + 212521 = 2160^2 + 461^2 .

It is a cyclic number.

It is not a de Polignac number, because 4878121 - 2³ = 4878113 is a prime.

It is not a weakly prime, because it can be changed into another prime (4878151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2439060 + 2439061.

It is an arithmetic number, because the mean of its divisors is an integer number (2439061).

Almost surely, 2^4878121 is an apocalyptic number.

It is an amenable number.

4878121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4878121 is an equidigital number, since it uses as much as digits as its factorization.

4878121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3584, while the sum is 31.

The square root of 4878121 is about 2208.6468708239. The cubic root of 4878121 is about 169.5967489476.

The spelling of 4878121 in words is "four million, eight hundred seventy-eight thousand, one hundred twenty-one".