4002149 has 4 divisors (see below), whose sum is σ = 4067820. Its totient is φ = 3936480.

The previous prime is 4002143. The next prime is 4002169. The reversal of 4002149 is 9412004.

4002149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1737124 + 2265025 = 1318^2 + 1505^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4002149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4002149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4002143) 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 3 ways as a sum of consecutive naturals, for example, 32744 + ... + 32865.

It is an arithmetic number, because the mean of its divisors is an integer number (1016955).

Almost surely, 2^4002149 is an apocalyptic number.

It is an amenable number.

4002149 is a deficient number, since it is larger than the sum of its proper divisors (65671).

4002149 is an equidigital number, since it uses as much as digits as its factorization.

4002149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65670.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 4002149 is about 2000.5371778600. The cubic root of 4002149 is about 158.7685278146.

The spelling of 4002149 in words is "four million, two thousand, one hundred forty-nine".