2141921 has 6 divisors (see below), whose sum is σ = 2239650. Its totient is φ = 2048288.

The previous prime is 2141917. The next prime is 2141929. The reversal of 2141921 is 1291412.

It can be written as a sum of positive squares in only one way, i.e., 1600225 + 541696 = 1265^2 + 736^2 .

It is not a de Polignac number, because 2141921 - 2² = 2141917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2141893 and 2141902.

It is not an unprimeable number, because it can be changed into a prime (2141929) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1496 + ... + 2553.

It is an arithmetic number, because the mean of its divisors is an integer number (373275).

2^2141921 is an apocalyptic number.

It is an amenable number.

2141921 is a deficient number, since it is larger than the sum of its proper divisors (97729).

2141921 is an equidigital number, since it uses as much as digits as its factorization.

2141921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4095 (or 4072 counting only the distinct ones).

The product of its digits is 144, while the sum is 20.

The square root of 2141921 is about 1463.5303208338. The cubic root of 2141921 is about 128.9044221216.

The spelling of 2141921 in words is "two million, one hundred forty-one thousand, nine hundred twenty-one".