2640143 has 8 divisors (see below), whose sum is σ = 2892240. Its totient is φ = 2390080.

The previous prime is 2640139. The next prime is 2640163. The reversal of 2640143 is 3410462.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2640143 - 2² = 2640139 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 (2640163) 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, 3971 + ... + 4587.

It is an arithmetic number, because the mean of its divisors is an integer number (361530).

2^2640143 is an apocalyptic number.

2640143 is a deficient number, since it is larger than the sum of its proper divisors (252097).

2640143 is a wasteful number, since it uses less digits than its factorization.

2640143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 2640143 is about 1624.8516855393. The cubic root of 2640143 is about 138.2109599858.

The spelling of 2640143 in words is "two million, six hundred forty thousand, one hundred forty-three".