1043056509 has 64 divisors (see below), whose sum is σ = 1680998400. Its totient is φ = 567864000.

The previous prime is 1043056499. The next prime is 1043056561. The reversal of 1043056509 is 9056503401.

It is a happy number.

It is not a de Polignac number, because 1043056509 - 2⁴ = 1043056493 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 1043056509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1043056109) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2177332 + ... + 2177810.

It is an arithmetic number, because the mean of its divisors is an integer number (26265600).

Almost surely, 2^1043056509 is an apocalyptic number.

1043056509 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1043056509 is a deficient number, since it is larger than the sum of its proper divisors (637941891).

1043056509 is a wasteful number, since it uses less digits than its factorization.

1043056509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686.

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 1043056509 is about 32296.3853859840. The cubic root of 1043056509 is about 1014.1509749953.

The spelling of 1043056509 in words is "one billion, forty-three million, fifty-six thousand, five hundred nine".