1012509 has 6 divisors (see below), whose sum is σ = 1462526. Its totient is φ = 675000.

The previous prime is 1012507. The next prime is 1012513. The reversal of 1012509 is 9052101.

It can be written as a sum of positive squares in only one way, i.e., 656100 + 356409 = 810^2 + 597^2 .

It is not a de Polignac number, because 1012509 - 2¹ = 1012507 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

1012509 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1012491 and 1012500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012507) 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 in 5 ways as a sum of consecutive naturals, for example, 56242 + ... + 56259.

2^1012509 is an apocalyptic number.

It is an amenable number.

1012509 is a deficient number, since it is larger than the sum of its proper divisors (450017).

1012509 is a wasteful number, since it uses less digits than its factorization.

1012509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112507 (or 112504 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 1012509 is about 1006.2350620009. The cubic root of 1012509 is about 100.4152400372.

It can be divided in two parts, 1012 and 509, that added together give a square (1521 = 39²).

The spelling of 1012509 in words is "one million, twelve thousand, five hundred nine".