1159531 has 2 divisors, whose sum is σ = 1159532. Its totient is φ = 1159530.

The previous prime is 1159523. The next prime is 1159541. The reversal of 1159531 is 1359511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1159531 - 2³ = 1159523 is a prime.

It is a super-2 number, since 2×1159531² = 2689024279922, which contains 22 as substring.

1159531 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1159496 and 1159505.

It is not a weakly prime, because it can be changed into another prime (1159541) 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, 579765 + 579766.

It is an arithmetic number, because the mean of its divisors is an integer number (579766).

2^1159531 is an apocalyptic number.

1159531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1159531 is an equidigital number, since it uses as much as digits as its factorization.

1159531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 675, while the sum is 25.

The square root of 1159531 is about 1076.8152116310. The cubic root of 1159531 is about 105.0575950082.

The spelling of 1159531 in words is "one million, one hundred fifty-nine thousand, five hundred thirty-one".