4208945 has 24 divisors (see below), whose sum is σ = 5810616. Its totient is φ = 2915328.

The previous prime is 4208933. The next prime is 4208947. The reversal of 4208945 is 5498024.

4208945 = 65² + 66² + ... + 234².

It can be written as a sum of positive squares in 12 ways, for example, as 734449 + 3474496 = 857^2 + 1864^2 .

It is not a de Polignac number, because 4208945 - 2⁸ = 4208689 is a prime.

It is a Leyland number of the form 11⁴ + 4¹¹.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4208947) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14219 + ... + 14511.

It is an arithmetic number, because the mean of its divisors is an integer number (242109).

Almost surely, 2^4208945 is an apocalyptic number.

It is an amenable number.

4208945 is a deficient number, since it is larger than the sum of its proper divisors (1601671).

4208945 is a wasteful number, since it uses less digits than its factorization.

4208945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 4208945 is about 2051.5713489908. The cubic root of 4208945 is about 161.4573240127.

The spelling of 4208945 in words is "four million, two hundred eight thousand, nine hundred forty-five".