2541861 has 20 divisors (see below), whose sum is σ = 4340512. Its totient is φ = 1452168.

The previous prime is 2541853. The next prime is 2541883. The reversal of 2541861 is 1681452.

It is not a de Polignac number, because 2541861 - 2³ = 2541853 is a prime.

It is a super-2 number, since 2×2541861² = 12922114686642, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2541811) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1675 + ... + 2808.

2^2541861 is an apocalyptic number.

2541861 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2541861 is a deficient number, since it is larger than the sum of its proper divisors (1798651).

2541861 is an equidigital number, since it uses as much as digits as its factorization.

2541861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4502 (or 4493 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 2541861 is about 1594.3214857738. The cubic root of 2541861 is about 136.4742132184.

The spelling of 2541861 in words is "two million, five hundred forty-one thousand, eight hundred sixty-one".