4209345 has 72 divisors (see below), whose sum is σ = 8963136. Its totient is φ = 1818432.

The previous prime is 4209311. The next prime is 4209349. The reversal of 4209345 is 5439024.

It is not a de Polignac number, because 4209345 - 2⁶ = 4209281 is a prime.

It is a d-powerful number, because it can be written as 4⁴ + 2¹³ + 0 + 9⁴ + 3³ + 4¹¹ + 5 .

It is not an unprimeable number, because it can be changed into a prime (4209349) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 50674 + ... + 50756.

It is an arithmetic number, because the mean of its divisors is an integer number (124488).

Almost surely, 2^4209345 is an apocalyptic number.

4209345 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4209345 is an abundant number, since it is smaller than the sum of its proper divisors (4753791).

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

4209345 is a wasteful number, since it uses less digits than its factorization.

4209345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131 (or 121 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 4209345 is about 2051.6688329260. The cubic root of 4209345 is about 161.4624385868.

It can be divided in two parts, 4209 and 345, that added together give a palindrome (4554).

The spelling of 4209345 in words is "four million, two hundred nine thousand, three hundred forty-five".