4291091 has 4 divisors (see below), whose sum is σ = 4904112. Its totient is φ = 3678072.

The previous prime is 4291073. The next prime is 4291097. The reversal of 4291091 is 1901924.

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 4291091 - 2¹⁴ = 4274707 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4291091.

It is not an unprimeable number, because it can be changed into a prime (4291097) 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, 306500 + ... + 306513.

It is an arithmetic number, because the mean of its divisors is an integer number (1226028).

Almost surely, 2^4291091 is an apocalyptic number.

4291091 is a deficient number, since it is larger than the sum of its proper divisors (613021).

4291091 is an equidigital number, since it uses as much as digits as its factorization.

4291091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613020.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 4291091 is about 2071.4948708602. The cubic root of 4291091 is about 162.5009514737.

The spelling of 4291091 in words is "four million, two hundred ninety-one thousand, ninety-one".