1153531 has 2 divisors, whose sum is σ = 1153532. Its totient is φ = 1153530.

The previous prime is 1153517. The next prime is 1153553. The reversal of 1153531 is 1353511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1153531 - 2¹¹ = 1151483 is a prime.

It is a super-2 number, since 2×1153531² = 2661267535922, which contains 22 as substring.

1153531 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1153499 and 1153508.

It is not a weakly prime, because it can be changed into another prime (1153511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 576765 + 576766.

It is an arithmetic number, because the mean of its divisors is an integer number (576766).

2^1153531 is an apocalyptic number.

1153531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1153531 is an equidigital number, since it uses as much as digits as its factorization.

1153531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225, while the sum is 19.

The square root of 1153531 is about 1074.0256049089. The cubic root of 1153531 is about 104.8760745059.

The spelling of 1153531 in words is "one million, one hundred fifty-three thousand, five hundred thirty-one".