4128705 has 64 divisors (see below), whose sum is σ = 8916480. Its totient is φ = 1769472.

The previous prime is 4128697. The next prime is 4128713. The reversal of 4128705 is 5078214.

It is an interprime number because it is at equal distance from previous prime (4128697) and next prime (4128713).

It is not a de Polignac number, because 4128705 - 2³ = 4128697 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15937 + ... + 16193.

It is an arithmetic number, because the mean of its divisors is an integer number (139320).

Almost surely, 2^4128705 is an apocalyptic number.

4128705 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4128705 is an abundant number, since it is smaller than the sum of its proper divisors (4787775).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4128705 is a wasteful number, since it uses less digits than its factorization.

4128705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295 (or 289 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 4128705 is about 2031.9215043894. The cubic root of 4128705 is about 160.4247179483.

The spelling of 4128705 in words is "four million, one hundred twenty-eight thousand, seven hundred five".