2142771 has 4 divisors (see below), whose sum is σ = 2857032. Its totient is φ = 1428512.

The previous prime is 2142761. The next prime is 2142773. The reversal of 2142771 is 1772412.

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 2142771 - 2⁵ = 2142739 is a prime.

It is an Ulam number.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (2142773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357126 + ... + 357131.

It is an arithmetic number, because the mean of its divisors is an integer number (714258).

2^2142771 is an apocalyptic number.

2142771 is a deficient number, since it is larger than the sum of its proper divisors (714261).

2142771 is an equidigital number, since it uses as much as digits as its factorization.

2142771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714260.

The product of its digits is 784, while the sum is 24.

The square root of 2142771 is about 1463.8206857399. The cubic root of 2142771 is about 128.9214713449.

The spelling of 2142771 in words is "two million, one hundred forty-two thousand, seven hundred seventy-one".