4091245 has 4 divisors (see below), whose sum is σ = 4909500. Its totient is φ = 3272992.

The previous prime is 4091239. The next prime is 4091249. The reversal of 4091245 is 5421904.

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 1713481 + 2377764 = 1309^2 + 1542^2 .

It is a cyclic number.

It is not a de Polignac number, because 4091245 - 2⁹ = 4090733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4091249) 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, 409120 + ... + 409129.

It is an arithmetic number, because the mean of its divisors is an integer number (1227375).

Almost surely, 2^4091245 is an apocalyptic number.

It is an amenable number.

4091245 is a deficient number, since it is larger than the sum of its proper divisors (818255).

4091245 is an equidigital number, since it uses as much as digits as its factorization.

4091245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818254.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 4091245 is about 2022.6826246349. The cubic root of 4091245 is about 159.9380619636.

The spelling of 4091245 in words is "four million, ninety-one thousand, two hundred forty-five".