2661143 has 4 divisors (see below), whose sum is σ = 2669160. Its totient is φ = 2653128.

The previous prime is 2661137. The next prime is 2661157. The reversal of 2661143 is 3411662.

It is a happy number.

2661143 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 2661143 - 2⁶ = 2661079 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 (2661103) 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, 3488 + ... + 4181.

It is an arithmetic number, because the mean of its divisors is an integer number (667290).

2^2661143 is an apocalyptic number.

2661143 is a deficient number, since it is larger than the sum of its proper divisors (8017).

2661143 is an equidigital number, since it uses as much as digits as its factorization.

2661143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8016.

The product of its digits is 864, while the sum is 23.

The square root of 2661143 is about 1631.3010145280. The cubic root of 2661143 is about 138.5764412704.

The spelling of 2661143 in words is "two million, six hundred sixty-one thousand, one hundred forty-three".