1123531 has 2 divisors, whose sum is σ = 1123532. Its totient is φ = 1123530.

The previous prime is 1123517. The next prime is 1123541. The reversal of 1123531 is 1353211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1123531 - 2⁷ = 1123403 is a prime.

It is a super-2 number, since 2×1123531² = 2524643815922, which contains 22 as substring.

1123531 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1123501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561765 + 561766.

It is an arithmetic number, because the mean of its divisors is an integer number (561766).

2^1123531 is an apocalyptic number.

1123531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123531 is an equidigital number, since it uses as much as digits as its factorization.

1123531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90, while the sum is 16.

The square root of 1123531 is about 1059.9674523305. The cubic root of 1123531 is about 103.9589026474.

Adding to 1123531 its reverse (1353211), we get a palindrome (2476742).

The spelling of 1123531 in words is "one million, one hundred twenty-three thousand, five hundred thirty-one".