1241921 has 2 divisors, whose sum is σ = 1241922. Its totient is φ = 1241920.

The previous prime is 1241893. The next prime is 1241923. The reversal of 1241921 is 1291421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 801025 + 440896 = 895^2 + 664^2 .

It is an emirp because it is prime and its reverse (1291421) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1241921 is a prime.

Together with 1241923, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1241893 and 1241902.

It is not a weakly prime, because it can be changed into another prime (1241923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620960 + 620961.

It is an arithmetic number, because the mean of its divisors is an integer number (620961).

2^1241921 is an apocalyptic number.

It is an amenable number.

1241921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1241921 is an equidigital number, since it uses as much as digits as its factorization.

1241921 is an evil number, because the sum of its binary digits is even.

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

The square root of 1241921 is about 1114.4150932216. The cubic root of 1241921 is about 107.4891570098.

The spelling of 1241921 in words is "one million, two hundred forty-one thousand, nine hundred twenty-one".