2541691 has 4 divisors (see below), whose sum is σ = 2567992. Its totient is φ = 2515392.

The previous prime is 2541689. The next prime is 2541697. The reversal of 2541691 is 1961452.

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 2541691 - 2¹ = 2541689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2541697) 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, 13005 + ... + 13198.

It is an arithmetic number, because the mean of its divisors is an integer number (641998).

2^2541691 is an apocalyptic number.

2541691 is a deficient number, since it is larger than the sum of its proper divisors (26301).

2541691 is an equidigital number, since it uses as much as digits as its factorization.

2541691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26300.

The product of its digits is 2160, while the sum is 28.

The square root of 2541691 is about 1594.2681706664. The cubic root of 2541691 is about 136.4711706794.

The spelling of 2541691 in words is "two million, five hundred forty-one thousand, six hundred ninety-one".