2123741 has 2 divisors, whose sum is σ = 2123742. Its totient is φ = 2123740.

The previous prime is 2123731. The next prime is 2123743. The reversal of 2123741 is 1473212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2059225 + 64516 = 1435^2 + 254^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2123741 is a prime.

Together with 2123743, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123743) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061870 + 1061871.

It is an arithmetic number, because the mean of its divisors is an integer number (1061871).

2^2123741 is an apocalyptic number.

It is an amenable number.

2123741 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123741 is an equidigital number, since it uses as much as digits as its factorization.

2123741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 20.

The square root of 2123741 is about 1457.3060762928. The cubic root of 2123741 is about 128.5386843717.

Adding to 2123741 its reverse (1473212), we get a palindrome (3596953).

The spelling of 2123741 in words is "two million, one hundred twenty-three thousand, seven hundred forty-one".