7266391 has 8 divisors (see below), whose sum is σ = 7962768. Its totient is φ = 6576000.

The previous prime is 7266349. The next prime is 7266403. The reversal of 7266391 is 1936627.

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 7266391 - 2¹⁷ = 7135319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7266491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1281 + ... + 4021.

It is an arithmetic number, because the mean of its divisors is an integer number (995346).

Almost surely, 2^7266391 is an apocalyptic number.

7266391 is a deficient number, since it is larger than the sum of its proper divisors (696377).

7266391 is a wasteful number, since it uses less digits than its factorization.

7266391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2993.

The product of its digits is 13608, while the sum is 34.

The square root of 7266391 is about 2695.6244174588. The cubic root of 7266391 is about 193.6895786620.

It can be divided in two parts, 726 and 6391, that added together give a palindrome (7117).

The spelling of 7266391 in words is "seven million, two hundred sixty-six thousand, three hundred ninety-one".