2155241 has 4 divisors (see below), whose sum is σ = 2351184. Its totient is φ = 1959300.

The previous prime is 2155207. The next prime is 2155253. The reversal of 2155241 is 1425512.

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 2155241 - 2⁶ = 2155177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2155201) 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, 97955 + ... + 97976.

It is an arithmetic number, because the mean of its divisors is an integer number (587796).

2^2155241 is an apocalyptic number.

It is an amenable number.

2155241 is a deficient number, since it is larger than the sum of its proper divisors (195943).

2155241 is a wasteful number, since it uses less digits than its factorization.

2155241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195942.

The product of its digits is 400, while the sum is 20.

The square root of 2155241 is about 1468.0739082212. The cubic root of 2155241 is about 129.1710768294.

The spelling of 2155241 in words is "two million, one hundred fifty-five thousand, two hundred forty-one".