4645215 has 32 divisors (see below), whose sum is σ = 8697600. Its totient is φ = 2345760.

The previous prime is 4645187. The next prime is 4645231. The reversal of 4645215 is 5125464.

4645215 is a `hidden beast` number, since 4 + 645 + 2 + 15 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-4645215 is a prime.

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

4645215 is a lucky number.

It is a zygodrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1660 + ... + 3470.

It is an arithmetic number, because the mean of its divisors is an integer number (271800).

Almost surely, 2^4645215 is an apocalyptic number.

4645215 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

4645215 is a deficient number, since it is larger than the sum of its proper divisors (4052385).

4645215 is a wasteful number, since it uses less digits than its factorization.

4645215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1844 (or 1838 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 4645215 is about 2155.2760844031. The cubic root of 4645215 is about 166.8534816339.

Subtracting 4645215 from its reverse (5125464), we obtain a square (480249 = 693²).

The spelling of 4645215 in words is "four million, six hundred forty-five thousand, two hundred fifteen".