12273515 has 4 divisors (see below), whose sum is σ = 14728224. Its totient is φ = 9818808.

The previous prime is 12273497. The next prime is 12273523. The reversal of 12273515 is 51537221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51537221 = 31 ⋅1662491.

It is a cyclic number.

It is not a de Polignac number, because 12273515 - 2⁶ = 12273451 is a prime.

It is a Duffinian 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, 1227347 + ... + 1227356.

It is an arithmetic number, because the mean of its divisors is an integer number (3682056).

Almost surely, 2^12273515 is an apocalyptic number.

12273515 is a deficient number, since it is larger than the sum of its proper divisors (2454709).

12273515 is an equidigital number, since it uses as much as digits as its factorization.

12273515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2454708.

The product of its digits is 2100, while the sum is 26.

The square root of 12273515 is about 3503.3576751454. The cubic root of 12273515 is about 230.6692229197.

It can be divided in two parts, 122 and 73515, that added together give a palindrome (73637).

The spelling of 12273515 in words is "twelve million, two hundred seventy-three thousand, five hundred fifteen".