1043921 has 2 divisors, whose sum is σ = 1043922. Its totient is φ = 1043920.

The previous prime is 1043899. The next prime is 1043923. The reversal of 1043921 is 1293401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 960400 + 83521 = 980^2 + 289^2 .

It is an emirp because it is prime and its reverse (1293401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1043921 - 2⁶ = 1043857 is a prime.

Together with 1043923, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1043893 and 1043902.

It is not a weakly prime, because it can be changed into another prime (1043923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521960 + 521961.

It is an arithmetic number, because the mean of its divisors is an integer number (521961).

2^1043921 is an apocalyptic number.

It is an amenable number.

1043921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1043921 is an equidigital number, since it uses as much as digits as its factorization.

1043921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1043921 is about 1021.7245225598. The cubic root of 1043921 is about 101.4431075604.

The spelling of 1043921 in words is "one million, forty-three thousand, nine hundred twenty-one".