4287905 has 4 divisors (see below), whose sum is σ = 5145492. Its totient is φ = 3430320.

The previous prime is 4287887. The next prime is 4287919. The reversal of 4287905 is 5097824.

It is a happy number.

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 512656 + 3775249 = 716^2 + 1943^2 .

It is not a de Polignac number, because 4287905 - 2⁶ = 4287841 is a prime.

It is a super-2 number, since 2×4287905² = 36772258578050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 428786 + ... + 428795.

It is an arithmetic number, because the mean of its divisors is an integer number (1286373).

Almost surely, 2^4287905 is an apocalyptic number.

It is an amenable number.

4287905 is a deficient number, since it is larger than the sum of its proper divisors (857587).

4287905 is an equidigital number, since it uses as much as digits as its factorization.

4287905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857586.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 4287905 is about 2070.7257181964. The cubic root of 4287905 is about 162.4607242357.

The spelling of 4287905 in words is "four million, two hundred eighty-seven thousand, nine hundred five".