1156523 has 2 divisors, whose sum is σ = 1156524. Its totient is φ = 1156522.

The previous prime is 1156501. The next prime is 1156537. The reversal of 1156523 is 3256511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1156523 - 2¹⁰ = 1155499 is a prime.

It is not a weakly prime, because it can be changed into another prime (1156553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578261 + 578262.

It is an arithmetic number, because the mean of its divisors is an integer number (578262).

2^1156523 is an apocalyptic number.

1156523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156523 is an equidigital number, since it uses as much as digits as its factorization.

1156523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 900, while the sum is 23.

The square root of 1156523 is about 1075.4175933097. The cubic root of 1156523 is about 104.9666712058.

The spelling of 1156523 in words is "one million, one hundred fifty-six thousand, five hundred twenty-three".