2148091 has 4 divisors (see below), whose sum is σ = 2343384. Its totient is φ = 1952800.

The previous prime is 2148073. The next prime is 2148127. The reversal of 2148091 is 1908412.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2148091 - 2¹¹ = 2146043 is a prime.

It is a super-2 number, since 2×2148091² = 9228589888562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2148011) 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, 97630 + ... + 97651.

It is an arithmetic number, because the mean of its divisors is an integer number (585846).

2^2148091 is an apocalyptic number.

2148091 is a deficient number, since it is larger than the sum of its proper divisors (195293).

2148091 is a wasteful number, since it uses less digits than its factorization.

2148091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195292.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 2148091 is about 1465.6367217015. The cubic root of 2148091 is about 129.0280771367.

The spelling of 2148091 in words is "two million, one hundred forty-eight thousand, ninety-one".