2157941 has 8 divisors (see below), whose sum is σ = 2247168. Its totient is φ = 2070000.

The previous prime is 2157923. The next prime is 2157989. The reversal of 2157941 is 1497512.

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 2157941 - 2¹⁸ = 1895797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157901) 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, 4451 + ... + 4911.

It is an arithmetic number, because the mean of its divisors is an integer number (280896).

2^2157941 is an apocalyptic number.

It is an amenable number.

2157941 is a deficient number, since it is larger than the sum of its proper divisors (89227).

2157941 is a wasteful number, since it uses less digits than its factorization.

2157941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643.

The product of its digits is 2520, while the sum is 29.

The square root of 2157941 is about 1468.9931926323. The cubic root of 2157941 is about 129.2249944455.

The spelling of 2157941 in words is "two million, one hundred fifty-seven thousand, nine hundred forty-one".