12478065 has 16 divisors (see below), whose sum is σ = 20505408. Its totient is φ = 6474816.

The previous prime is 12478061. The next prime is 12478111. The reversal of 12478065 is 56087421.

It is not a de Polignac number, because 12478065 - 2² = 12478061 is a prime.

It is a super-2 number, since 2×12478065² = 311404212288450, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12478061) 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, 10687 + ... + 11796.

It is an arithmetic number, because the mean of its divisors is an integer number (1281588).

Almost surely, 2^12478065 is an apocalyptic number.

12478065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12478065 is a deficient number, since it is larger than the sum of its proper divisors (8027343).

12478065 is a wasteful number, since it uses less digits than its factorization.

12478065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22528.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 12478065 is about 3532.4304664069. The cubic root of 12478065 is about 231.9436111964.

The spelling of 12478065 in words is "twelve million, four hundred seventy-eight thousand, sixty-five".