12533865 has 8 divisors (see below), whose sum is σ = 20054208. Its totient is φ = 6684720.

The previous prime is 12533839. The next prime is 12533869. The reversal of 12533865 is 56833521.

12533865 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12533865 - 2⁷ = 12533737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12533869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 417781 + ... + 417810.

It is an arithmetic number, because the mean of its divisors is an integer number (2506776).

Almost surely, 2^12533865 is an apocalyptic number.

12533865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12533865 is a deficient number, since it is larger than the sum of its proper divisors (7520343).

12533865 is an equidigital number, since it uses as much as digits as its factorization.

12533865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835599.

The product of its digits is 21600, while the sum is 33.

The square root of 12533865 is about 3540.3199007999. The cubic root of 12533865 is about 232.2888359052.

The spelling of 12533865 in words is "twelve million, five hundred thirty-three thousand, eight hundred sixty-five".