2129149 has 4 divisors (see below), whose sum is σ = 2322720. Its totient is φ = 1935580.

The previous prime is 2129123. The next prime is 2129161. The reversal of 2129149 is 9419212.

It is a happy number.

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 2129149 - 2¹³ = 2120957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2129119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96769 + ... + 96790.

It is an arithmetic number, because the mean of its divisors is an integer number (580680).

2^2129149 is an apocalyptic number.

It is an amenable number.

2129149 is a deficient number, since it is larger than the sum of its proper divisors (193571).

2129149 is a wasteful number, since it uses less digits than its factorization.

2129149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193570.

The product of its digits is 1296, while the sum is 28.

The square root of 2129149 is about 1459.1603750102. The cubic root of 2129149 is about 128.6476976639.

It can be divided in two parts, 2129 and 149, that added together give a triangular number (2278 = T₆₇).

The spelling of 2129149 in words is "two million, one hundred twenty-nine thousand, one hundred forty-nine".