4071391 has 8 divisors (see below), whose sum is σ = 4272480. Its totient is φ = 3872352.

The previous prime is 4071383. The next prime is 4071401. The reversal of 4071391 is 1931704.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4071391 - 2³ = 4071383 is a prime.

4071391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4071371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4881 + ... + 5653.

It is an arithmetic number, because the mean of its divisors is an integer number (534060).

Almost surely, 2^4071391 is an apocalyptic number.

4071391 is a deficient number, since it is larger than the sum of its proper divisors (201089).

4071391 is a wasteful number, since it uses less digits than its factorization.

4071391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025.

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

The square root of 4071391 is about 2017.7688172831. The cubic root of 4071391 is about 159.6789264420.

It can be divided in two parts, 40713 and 91, that added together give a palindrome (40804).

The spelling of 4071391 in words is "four million, seventy-one thousand, three hundred ninety-one".