2145711 has 4 divisors (see below), whose sum is σ = 2860952. Its totient is φ = 1430472.

The previous prime is 2145709. The next prime is 2145713. The reversal of 2145711 is 1175412.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2145709) and next prime (2145713).

It is not a de Polignac number, because 2145711 - 2¹ = 2145709 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357616 + ... + 357621.

It is an arithmetic number, because the mean of its divisors is an integer number (715238).

2^2145711 is an apocalyptic number.

2145711 is a deficient number, since it is larger than the sum of its proper divisors (715241).

2145711 is an equidigital number, since it uses as much as digits as its factorization.

2145711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715240.

The product of its digits is 280, while the sum is 21.

The square root of 2145711 is about 1464.8245628743. The cubic root of 2145711 is about 128.9804068554.

Subtracting from 2145711 its reverse (1175412), we obtain a cube (970299 = 99³).

The spelling of 2145711 in words is "two million, one hundred forty-five thousand, seven hundred eleven".