4247591 has 4 divisors (see below), whose sum is σ = 4251792. Its totient is φ = 4243392.

The previous prime is 4247567. The next prime is 4247597. The reversal of 4247591 is 1957424.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4247591 - 2¹⁴ = 4231207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4247597) 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, 446 + ... + 2948.

It is an arithmetic number, because the mean of its divisors is an integer number (1062948).

Almost surely, 2^4247591 is an apocalyptic number.

4247591 is a deficient number, since it is larger than the sum of its proper divisors (4201).

4247591 is a wasteful number, since it uses less digits than its factorization.

4247591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4200.

The product of its digits is 10080, while the sum is 32.

The square root of 4247591 is about 2060.9684616704. The cubic root of 4247591 is about 161.9499794763.

The spelling of 4247591 in words is "four million, two hundred forty-seven thousand, five hundred ninety-one".