1140509 has 4 divisors (see below), whose sum is σ = 1150716. Its totient is φ = 1130304.

The previous prime is 1140493. The next prime is 1140533. The reversal of 1140509 is 9050411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9050411 = 311 ⋅29101.

It can be written as a sum of positive squares in 2 ways, for example, as 228484 + 912025 = 478^2 + 955^2 .

It is a cyclic number.

It is not a de Polignac number, because 1140509 - 2⁴ = 1140493 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140539) 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 in 3 ways as a sum of consecutive naturals, for example, 4934 + ... + 5159.

It is an arithmetic number, because the mean of its divisors is an integer number (287679).

2^1140509 is an apocalyptic number.

It is an amenable number.

1140509 is a deficient number, since it is larger than the sum of its proper divisors (10207).

1140509 is a wasteful number, since it uses less digits than its factorization.

1140509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10206.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 1140509 is about 1067.9461596916. The cubic root of 1140509 is about 104.4799378472.

The spelling of 1140509 in words is "one million, one hundred forty thousand, five hundred nine".