12038865 has 16 divisors (see below), whose sum is σ = 19305216. Its totient is φ = 6406400.

The previous prime is 12038861. The next prime is 12038879. The reversal of 12038865 is 56883021.

It is a happy number.

It is not a de Polignac number, because 12038865 - 2² = 12038861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12038861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12760 + ... + 13670.

It is an arithmetic number, because the mean of its divisors is an integer number (1206576).

Almost surely, 2^12038865 is an apocalyptic number.

12038865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12038865 is a deficient number, since it is larger than the sum of its proper divisors (7266351).

12038865 is an equidigital number, since it uses as much as digits as its factorization.

12038865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1800.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 12038865 is about 3469.7067599438. The cubic root of 12038865 is about 229.1897450404.

The spelling of 12038865 in words is "twelve million, thirty-eight thousand, eight hundred sixty-five".