4128645 has 32 divisors (see below), whose sum is σ = 6982272. Its totient is φ = 2080512.

The previous prime is 4128623. The next prime is 4128689. The reversal of 4128645 is 5468214.

It is not a de Polignac number, because 4128645 - 2⁵ = 4128613 is a prime.

It is an Ulam number.

4128645 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23779 + ... + 23951.

It is an arithmetic number, because the mean of its divisors is an integer number (218196).

Almost surely, 2^4128645 is an apocalyptic number.

It is an amenable number.

4128645 is a deficient number, since it is larger than the sum of its proper divisors (2853627).

4128645 is a wasteful number, since it uses less digits than its factorization.

4128645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261.

The product of its digits is 7680, while the sum is 30.

The square root of 4128645 is about 2031.9067399859. The cubic root of 4128645 is about 160.4239408257.

The spelling of 4128645 in words is "four million, one hundred twenty-eight thousand, six hundred forty-five".