4031345 has 4 divisors (see below), whose sum is σ = 4837620. Its totient is φ = 3225072.

The previous prime is 4031327. The next prime is 4031347. The reversal of 4031345 is 5431304.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1100401 + 2930944 = 1049^2 + 1712^2 .

It is a cyclic number.

It is not a de Polignac number, because 4031345 - 2⁶ = 4031281 is a prime.

It is a plaindrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (4031347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 403130 + ... + 403139.

It is an arithmetic number, because the mean of its divisors is an integer number (1209405).

Almost surely, 2^4031345 is an apocalyptic number.

It is an amenable number.

4031345 is a deficient number, since it is larger than the sum of its proper divisors (806275).

4031345 is an equidigital number, since it uses as much as digits as its factorization.

4031345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 806274.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 4031345 is about 2007.8209581534. The cubic root of 4031345 is about 159.1536691901.

Adding to 4031345 its reverse (5431304), we get a palindrome (9462649).

The spelling of 4031345 in words is "four million, thirty-one thousand, three hundred forty-five".