4278557 has 2 divisors, whose sum is σ = 4278558. Its totient is φ = 4278556.

The previous prime is 4278539. The next prime is 4278563. The reversal of 4278557 is 7558724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4268356 + 10201 = 2066^2 + 101^2 .

It is a cyclic number.

It is not a de Polignac number, because 4278557 - 2¹² = 4274461 is a prime.

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 4278557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4278257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2139278 + 2139279.

It is an arithmetic number, because the mean of its divisors is an integer number (2139279).

Almost surely, 2^4278557 is an apocalyptic number.

It is an amenable number.

4278557 is a deficient number, since it is larger than the sum of its proper divisors (1).

4278557 is an equidigital number, since it uses as much as digits as its factorization.

4278557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78400, while the sum is 38.

The square root of 4278557 is about 2068.4673069691. The cubic root of 4278557 is about 162.3425789093.

The spelling of 4278557 in words is "four million, two hundred seventy-eight thousand, five hundred fifty-seven".