2128349 has 4 divisors (see below), whose sum is σ = 2253564. Its totient is φ = 2003136.

The previous prime is 2128333. The next prime is 2128381. The reversal of 2128349 is 9438212.

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 1036324 + 1092025 = 1018^2 + 1045^2 .

It is a cyclic number.

It is not a de Polignac number, because 2128349 - 2⁴ = 2128333 is a prime.

It is a d-powerful number, because it can be written as 2¹³ + 1 + 2¹⁹ + 8³ + 3¹³ + 4⁵ + 9 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62582 + ... + 62615.

It is an arithmetic number, because the mean of its divisors is an integer number (563391).

2^2128349 is an apocalyptic number.

It is an amenable number.

2128349 is a deficient number, since it is larger than the sum of its proper divisors (125215).

2128349 is a wasteful number, since it uses less digits than its factorization.

2128349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125214.

The product of its digits is 3456, while the sum is 29.

The square root of 2128349 is about 1458.8862190041. The cubic root of 2128349 is about 128.6315830799.

The spelling of 2128349 in words is "two million, one hundred twenty-eight thousand, three hundred forty-nine".