1006531 has 2 divisors, whose sum is σ = 1006532. Its totient is φ = 1006530.

The previous prime is 1006513. The next prime is 1006543. The reversal of 1006531 is 1356001.

Together with previous prime (1006513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1006531 - 2¹¹ = 1004483 is a prime.

It is a super-2 number, since 2×1006531² = 2026209307922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1006231) 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, 503265 + 503266.

It is an arithmetic number, because the mean of its divisors is an integer number (503266).

2^1006531 is an apocalyptic number.

1006531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1006531 is an equidigital number, since it uses as much as digits as its factorization.

1006531 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1006531 is about 1003.2601855949. The cubic root of 1006531 is about 100.2172277792.

The spelling of 1006531 in words is "one million, six thousand, five hundred thirty-one".