2605191 has 4 divisors (see below), whose sum is σ = 3473592. Its totient is φ = 1736792.

The previous prime is 2605189. The next prime is 2605201. The reversal of 2605191 is 1915062.

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 2605191 - 2¹ = 2605189 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2605171) 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, 434196 + ... + 434201.

It is an arithmetic number, because the mean of its divisors is an integer number (868398).

2^2605191 is an apocalyptic number.

2605191 is a deficient number, since it is larger than the sum of its proper divisors (868401).

2605191 is an equidigital number, since it uses as much as digits as its factorization.

2605191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868400.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 2605191 is about 1614.0604077915. The cubic root of 2605191 is about 137.5983384681.

The spelling of 2605191 in words is "two million, six hundred five thousand, one hundred ninety-one".