2139149 has 2 divisors, whose sum is σ = 2139150. Its totient is φ = 2139148.

The previous prime is 2139143. The next prime is 2139157. The reversal of 2139149 is 9419312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2044900 + 94249 = 1430^2 + 307^2 .

It is a cyclic number.

It is not a de Polignac number, because 2139149 - 2¹⁶ = 2073613 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another 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 as a sum of consecutive naturals, namely, 1069574 + 1069575.

It is an arithmetic number, because the mean of its divisors is an integer number (1069575).

2^2139149 is an apocalyptic number.

It is an amenable number.

2139149 is a deficient number, since it is larger than the sum of its proper divisors (1).

2139149 is an equidigital number, since it uses as much as digits as its factorization.

2139149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 29.

The square root of 2139149 is about 1462.5829890984. The cubic root of 2139149 is about 128.8487902357.

The spelling of 2139149 in words is "two million, one hundred thirty-nine thousand, one hundred forty-nine".