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4878721 is a prime number
BaseRepresentation
bin10010100111000110000001
3100011212100101
4102213012001
52222104341
6252322401
756316451
oct22470601
910155311
104878721
112832501
121773401
13101a823
1490dd61
15665831
hex4a7181

4878721 has 2 divisors, whose sum is σ = 4878722. Its totient is φ = 4878720.

The previous prime is 4878701. The next prime is 4878767. The reversal of 4878721 is 1278784.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3474496 + 1404225 = 1864^2 + 1185^2 .

It is a cyclic number.

It is not a de Polignac number, because 4878721 - 27 = 4878593 is a prime.

It is not a weakly prime, because it can be changed into another prime (4878701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2439360 + 2439361.

It is an arithmetic number, because the mean of its divisors is an integer number (2439361).

Almost surely, 24878721 is an apocalyptic number.

It is an amenable number.

4878721 is a deficient number, since it is larger than the sum of its proper divisors (1).

4878721 is an equidigital number, since it uses as much as digits as its factorization.

4878721 is an odious number, because the sum of its binary digits is odd.

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

The square root of 4878721 is about 2208.7826964190. The cubic root of 4878721 is about 169.6037020263.

The spelling of 4878721 in words is "four million, eight hundred seventy-eight thousand, seven hundred twenty-one".