2145649 has 8 divisors (see below), whose sum is σ = 2360160. Its totient is φ = 1934400.

The previous prime is 2145643. The next prime is 2145677. The reversal of 2145649 is 9465412.

2145649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2145649 - 2³ = 2145641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2145649.

It is not an unprimeable number, because it can be changed into a prime (2145641) 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, 697 + ... + 2185.

It is an arithmetic number, because the mean of its divisors is an integer number (295020).

2^2145649 is an apocalyptic number.

It is an amenable number.

2145649 is a deficient number, since it is larger than the sum of its proper divisors (214511).

2145649 is a wasteful number, since it uses less digits than its factorization.

2145649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631.

The product of its digits is 8640, while the sum is 31.

The square root of 2145649 is about 1464.8033997776. The cubic root of 2145649 is about 128.9791645535.

The spelling of 2145649 in words is "two million, one hundred forty-five thousand, six hundred forty-nine".