2144991 has 8 divisors (see below), whose sum is σ = 2868784. Its totient is φ = 1425600.

The previous prime is 2144977. The next prime is 2144993. The reversal of 2144991 is 1994412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2144991 - 2⁹ = 2144479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144993) 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 7 ways as a sum of consecutive naturals, for example, 291 + ... + 2091.

It is an arithmetic number, because the mean of its divisors is an integer number (358598).

2^2144991 is an apocalyptic number.

2144991 is a deficient number, since it is larger than the sum of its proper divisors (723793).

2144991 is a wasteful number, since it uses less digits than its factorization.

2144991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2201.

The product of its digits is 2592, while the sum is 30.

The square root of 2144991 is about 1464.5787790351. The cubic root of 2144991 is about 128.9659786492.

It can be divided in two parts, 2 and 144991, that multiplied together give a palindrome (289982).

The spelling of 2144991 in words is "two million, one hundred forty-four thousand, nine hundred ninety-one".