2138541 has 4 divisors (see below), whose sum is σ = 2851392. Its totient is φ = 1425692.

The previous prime is 2138537. The next prime is 2138551. The reversal of 2138541 is 1458312.

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 2138541 - 2² = 2138537 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2138501) 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, 356421 + ... + 356426.

It is an arithmetic number, because the mean of its divisors is an integer number (712848).

2^2138541 is an apocalyptic number.

It is an amenable number.

2138541 is a deficient number, since it is larger than the sum of its proper divisors (712851).

2138541 is an equidigital number, since it uses as much as digits as its factorization.

2138541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712850.

The product of its digits is 960, while the sum is 24.

The square root of 2138541 is about 1462.3751228737. The cubic root of 2138541 is about 128.8365817223.

The spelling of 2138541 in words is "two million, one hundred thirty-eight thousand, five hundred forty-one".