2144691 has 8 divisors (see below), whose sum is σ = 3177360. Its totient is φ = 1429776.

The previous prime is 2144689. The next prime is 2144707. The reversal of 2144691 is 1964412.

2144691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2144691 - 2¹ = 2144689 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 79433 = 2144691 / (2 + 1 + 4 + 4 + 6 + 9 + 1).

It is not an unprimeable number, because it can be changed into a prime (2144621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39690 + ... + 39743.

It is an arithmetic number, because the mean of its divisors is an integer number (397170).

2^2144691 is an apocalyptic number.

2144691 is a deficient number, since it is larger than the sum of its proper divisors (1032669).

2144691 is an equidigital number, since it uses as much as digits as its factorization.

2144691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79442 (or 79436 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 2144691 is about 1464.4763569276. The cubic root of 2144691 is about 128.9599659437.

The spelling of 2144691 in words is "two million, one hundred forty-four thousand, six hundred ninety-one".