4391071 has 4 divisors (see below), whose sum is σ = 4622200. Its totient is φ = 4159944.

The previous prime is 4391063. The next prime is 4391081. The reversal of 4391071 is 1701934.

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

It is a cyclic number.

It is not a de Polignac number, because 4391071 - 2³ = 4391063 is a prime.

It is a Duffinian number.

4391071 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4391011) 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, 115536 + ... + 115573.

It is an arithmetic number, because the mean of its divisors is an integer number (1155550).

Almost surely, 2^4391071 is an apocalyptic number.

4391071 is a deficient number, since it is larger than the sum of its proper divisors (231129).

4391071 is a wasteful number, since it uses less digits than its factorization.

4391071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231128.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 4391071 is about 2095.4882485951. The cubic root of 4391071 is about 163.7533348193.

The spelling of 4391071 in words is "four million, three hundred ninety-one thousand, seventy-one".