1121539 has 2 divisors, whose sum is σ = 1121540. Its totient is φ = 1121538.

The previous prime is 1121509. The next prime is 1121543. The reversal of 1121539 is 9351211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1121539 - 2⁹ = 1121027 is a prime.

1121539 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1121509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560769 + 560770.

It is an arithmetic number, because the mean of its divisors is an integer number (560770).

2^1121539 is an apocalyptic number.

1121539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121539 is an equidigital number, since it uses as much as digits as its factorization.

1121539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 270, while the sum is 22.

The square root of 1121539 is about 1059.0273839708. The cubic root of 1121539 is about 103.8974272212.

The spelling of 1121539 in words is "one million, one hundred twenty-one thousand, five hundred thirty-nine".