2139147 has 6 divisors (see below), whose sum is σ = 3089892. Its totient is φ = 1426092.

The previous prime is 2139143. The next prime is 2139149. The reversal of 2139147 is 7419312.

It is not a de Polignac number, because 2139147 - 2² = 2139143 is a prime.

2139147 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2139147.

It is not an unprimeable number, because it can be changed into a prime (2139143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 118833 + ... + 118850.

It is an arithmetic number, because the mean of its divisors is an integer number (514982).

2^2139147 is an apocalyptic number.

2139147 is a deficient number, since it is larger than the sum of its proper divisors (950745).

2139147 is a wasteful number, since it uses less digits than its factorization.

2139147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237689 (or 237686 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 2139147 is about 1462.5823053764. The cubic root of 2139147 is about 128.8487500799.

The spelling of 2139147 in words is "two million, one hundred thirty-nine thousand, one hundred forty-seven".