1045258809 has 32 divisors (see below), whose sum is σ = 1638144000. Its totient is φ = 580508544.

The previous prime is 1045258783. The next prime is 1045258811. The reversal of 1045258809 is 9088525401.

It is a happy number.

It is not a de Polignac number, because 1045258809 - 2⁵ = 1045258777 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1045258009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105532 + ... + 115010.

It is an arithmetic number, because the mean of its divisors is an integer number (51192000).

Almost surely, 2^1045258809 is an apocalyptic number.

It is an amenable number.

1045258809 is a deficient number, since it is larger than the sum of its proper divisors (592885191).

1045258809 is an equidigital number, since it uses as much as digits as its factorization.

1045258809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9637.

The product of its (nonzero) digits is 115200, while the sum is 42.

The square root of 1045258809 is about 32330.4625546867. The cubic root of 1045258809 is about 1014.8642296172.

The spelling of 1045258809 in words is "one billion, forty-five million, two hundred fifty-eight thousand, eight hundred nine".