1159421 has 2 divisors, whose sum is σ = 1159422. Its totient is φ = 1159420.

The previous prime is 1159397. The next prime is 1159423. The reversal of 1159421 is 1249511.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 722500 + 436921 = 850^2 + 661^2 .

It is an emirp because it is prime and its reverse (1249511) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1159421 is a prime.

It is a Sophie Germain prime.

Together with 1159423, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1159423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 579710 + 579711.

It is an arithmetic number, because the mean of its divisors is an integer number (579711).

2^1159421 is an apocalyptic number.

It is an amenable number.

1159421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1159421 is an equidigital number, since it uses as much as digits as its factorization.

1159421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 360, while the sum is 23.

The square root of 1159421 is about 1076.7641338752. The cubic root of 1159421 is about 105.0542727739.

The spelling of 1159421 in words is "one million, one hundred fifty-nine thousand, four hundred twenty-one".