2144661 has 4 divisors (see below), whose sum is σ = 2859552. Its totient is φ = 1429772.

The previous prime is 2144647. The next prime is 2144671. The reversal of 2144661 is 1664412.

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 a cyclic number.

It is not a de Polignac number, because 2144661 - 2⁵ = 2144629 is a prime.

It is a D-number.

2144661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144621) 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, 357441 + ... + 357446.

It is an arithmetic number, because the mean of its divisors is an integer number (714888).

2^2144661 is an apocalyptic number.

It is an amenable number.

2144661 is a deficient number, since it is larger than the sum of its proper divisors (714891).

2144661 is an equidigital number, since it uses as much as digits as its factorization.

2144661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714890.

The product of its digits is 1152, while the sum is 24.

The square root of 2144661 is about 1464.4661143229. The cubic root of 2144661 is about 128.9593646424.

Subtracting from 2144661 its reverse (1664412), we obtain a square (480249 = 693²).

The spelling of 2144661 in words is "two million, one hundred forty-four thousand, six hundred sixty-one".