2541991 has 8 divisors (see below), whose sum is σ = 2690480. Its totient is φ = 2395008.

The previous prime is 2541967. The next prime is 2541997. The reversal of 2541991 is 1991452.

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 2541991 - 2⁹ = 2541479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2541997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6205 + ... + 6601.

It is an arithmetic number, because the mean of its divisors is an integer number (336310).

2^2541991 is an apocalyptic number.

2541991 is a deficient number, since it is larger than the sum of its proper divisors (148489).

2541991 is a wasteful number, since it uses less digits than its factorization.

2541991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753.

The product of its digits is 3240, while the sum is 31.

The square root of 2541991 is about 1594.3622549471. The cubic root of 2541991 is about 136.4765397743.

The spelling of 2541991 in words is "two million, five hundred forty-one thousand, nine hundred ninety-one".