1121509 has 2 divisors, whose sum is σ = 1121510. Its totient is φ = 1121508.

The previous prime is 1121453. The next prime is 1121539. The reversal of 1121509 is 9051211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 893025 + 228484 = 945^2 + 478^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121509 - 2¹³ = 1113317 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560754 + 560755.

It is an arithmetic number, because the mean of its divisors is an integer number (560755).

2^1121509 is an apocalyptic number.

It is an amenable number.

1121509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121509 is an equidigital number, since it uses as much as digits as its factorization.

1121509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90, while the sum is 19.

The square root of 1121509 is about 1059.0132199364. The cubic root of 1121509 is about 103.8965008303.

The spelling of 1121509 in words is "one million, one hundred twenty-one thousand, five hundred nine".