2144869 has 4 divisors (see below), whose sum is σ = 2218860. Its totient is φ = 2070880.

The previous prime is 2144867. The next prime is 2144893. The reversal of 2144869 is 9684412.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1600225 + 544644 = 1265^2 + 738^2 .

It is a cyclic number.

It is not a de Polignac number, because 2144869 - 2¹ = 2144867 is a prime.

It is a super-2 number, since 2×2144869² = 9200926054322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144867) 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, 36952 + ... + 37009.

It is an arithmetic number, because the mean of its divisors is an integer number (554715).

2^2144869 is an apocalyptic number.

2144869 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2144869 is a deficient number, since it is larger than the sum of its proper divisors (73991).

2144869 is an equidigital number, since it uses as much as digits as its factorization.

2144869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73990.

The product of its digits is 13824, while the sum is 34.

The square root of 2144869 is about 1464.5371282422. The cubic root of 2144869 is about 128.9635335500.

It can be divided in two parts, 21 and 44869, that multiplied together give a palindrome (942249).

The spelling of 2144869 in words is "two million, one hundred forty-four thousand, eight hundred sixty-nine".