12280615 has 4 divisors (see below), whose sum is σ = 14736744. Its totient is φ = 9824488.

The previous prime is 12280591. The next prime is 12280621. The reversal of 12280615 is 51608221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12280615 - 2²¹ = 10183463 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12280615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1228057 + ... + 1228066.

It is an arithmetic number, because the mean of its divisors is an integer number (3684186).

Almost surely, 2^12280615 is an apocalyptic number.

12280615 is a deficient number, since it is larger than the sum of its proper divisors (2456129).

12280615 is an equidigital number, since it uses as much as digits as its factorization.

12280615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2456128.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 12280615 is about 3504.3708422483. The cubic root of 12280615 is about 230.7136936298.

Adding to 12280615 its reverse (51608221), we get a palindrome (63888836).

The spelling of 12280615 in words is "twelve million, two hundred eighty thousand, six hundred fifteen".