11545009 has 4 divisors (see below), whose sum is σ = 13194304. Its totient is φ = 9895716.

The previous prime is 11545003. The next prime is 11545019. The reversal of 11545009 is 90054511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90054511 = 827 ⋅108893.

It is a cyclic number.

It is not a de Polignac number, because 11545009 - 2⁵ = 11544977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11545003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 824637 + ... + 824650.

It is an arithmetic number, because the mean of its divisors is an integer number (3298576).

Almost surely, 2^11545009 is an apocalyptic number.

It is an amenable number.

11545009 is a deficient number, since it is larger than the sum of its proper divisors (1649295).

11545009 is an equidigital number, since it uses as much as digits as its factorization.

11545009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1649294.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 11545009 is about 3397.7947259951. The cubic root of 11545009 is about 226.0119619324.

The spelling of 11545009 in words is "eleven million, five hundred forty-five thousand, nine".