4278161 has 4 divisors (see below), whose sum is σ = 4464192. Its totient is φ = 4092132.

The previous prime is 4278143. The next prime is 4278179. The reversal of 4278161 is 1618724.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (4278143) and next prime (4278179).

It is a cyclic number.

It is not a de Polignac number, because 4278161 - 2²² = 83857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4278121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92981 + ... + 93026.

It is an arithmetic number, because the mean of its divisors is an integer number (1116048).

Almost surely, 2^4278161 is an apocalyptic number.

It is an amenable number.

4278161 is a deficient number, since it is larger than the sum of its proper divisors (186031).

4278161 is a wasteful number, since it uses less digits than its factorization.

4278161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186030.

The product of its digits is 2688, while the sum is 29.

The square root of 4278161 is about 2068.3715817038. The cubic root of 4278161 is about 162.3375702389.

The spelling of 4278161 in words is "four million, two hundred seventy-eight thousand, one hundred sixty-one".