2142849 has 4 divisors (see below), whose sum is σ = 2857136. Its totient is φ = 1428564.

The previous prime is 2142823. The next prime is 2142857. The reversal of 2142849 is 9482412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2142849 - 2²¹ = 45697 is a prime.

It is a D-number.

It is a Duffinian number.

2142849 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2142149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357139 + ... + 357144.

It is an arithmetic number, because the mean of its divisors is an integer number (714284).

2^2142849 is an apocalyptic number.

It is an amenable number.

2142849 is a deficient number, since it is larger than the sum of its proper divisors (714287).

2142849 is an equidigital number, since it uses as much as digits as its factorization.

2142849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714286.

The product of its digits is 4608, while the sum is 30.

The square root of 2142849 is about 1463.8473281049. The cubic root of 2142849 is about 128.9230356360.

The spelling of 2142849 in words is "two million, one hundred forty-two thousand, eight hundred forty-nine".