2542691 has 4 divisors (see below), whose sum is σ = 2630400. Its totient is φ = 2454984.

The previous prime is 2542681. The next prime is 2542699. The reversal of 2542691 is 1962452.

It is a happy number.

2542691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2542691 - 2¹⁸ = 2280547 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 87679 = 2542691 / (2 + 5 + 4 + 2 + 6 + 9 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2542699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43811 + ... + 43868.

It is an arithmetic number, because the mean of its divisors is an integer number (657600).

2^2542691 is an apocalyptic number.

2542691 is a deficient number, since it is larger than the sum of its proper divisors (87709).

2542691 is an equidigital number, since it uses as much as digits as its factorization.

2542691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87708.

The product of its digits is 4320, while the sum is 29.

The square root of 2542691 is about 1594.5817633474. The cubic root of 2542691 is about 136.4890660198.

The spelling of 2542691 in words is "two million, five hundred forty-two thousand, six hundred ninety-one".