4120391 has 8 divisors (see below), whose sum is σ = 4523904. Its totient is φ = 3721720.

The previous prime is 4120331. The next prime is 4120393. The reversal of 4120391 is 1930214.

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 4120391 - 2¹⁴ = 4104007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4120393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 716 + ... + 2958.

It is an arithmetic number, because the mean of its divisors is an integer number (565488).

Almost surely, 2^4120391 is an apocalyptic number.

4120391 is a deficient number, since it is larger than the sum of its proper divisors (403513).

4120391 is a wasteful number, since it uses less digits than its factorization.

4120391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2421.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 4120391 is about 2029.8746266703. The cubic root of 4120391 is about 160.3169628223.

It can be divided in two parts, 41203 and 91, that multiplied together give a palindrome (3749473).

The spelling of 4120391 in words is "four million, one hundred twenty thousand, three hundred ninety-one".