2128949 has 8 divisors (see below), whose sum is σ = 2239872. Its totient is φ = 2019600.

The previous prime is 2128933. The next prime is 2128963. The reversal of 2128949 is 9498212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2128949 - 2⁴ = 2128933 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 11.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3167 + ... + 3779.

It is an arithmetic number, because the mean of its divisors is an integer number (279984).

2^2128949 is an apocalyptic number.

It is an amenable number.

2128949 is a deficient number, since it is larger than the sum of its proper divisors (110923).

2128949 is a wasteful number, since it uses less digits than its factorization.

2128949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787.

The product of its digits is 10368, while the sum is 35.

The square root of 2128949 is about 1459.0918408380. The cubic root of 2128949 is about 128.6436693963.

The spelling of 2128949 in words is "two million, one hundred twenty-eight thousand, nine hundred forty-nine".