4280765 has 4 divisors (see below), whose sum is σ = 5136924. Its totient is φ = 3424608.

The previous prime is 4280747. The next prime is 4280767. The reversal of 4280765 is 5670824.

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 1545049 + 2735716 = 1243^2 + 1654^2 .

It is a cyclic number.

It is not a de Polignac number, because 4280765 - 2¹⁰ = 4279741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4280767) 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, 428072 + ... + 428081.

It is an arithmetic number, because the mean of its divisors is an integer number (1284231).

Almost surely, 2^4280765 is an apocalyptic number.

It is an amenable number.

4280765 is a deficient number, since it is larger than the sum of its proper divisors (856159).

4280765 is an equidigital number, since it uses as much as digits as its factorization.

4280765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856158.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 4280765 is about 2069.0009666503. Note that the first 3 decimals coincide. The cubic root of 4280765 is about 162.3705003768.

The spelling of 4280765 in words is "four million, two hundred eighty thousand, seven hundred sixty-five".