1222540115 has 4 divisors (see below), whose sum is σ = 1467048144. Its totient is φ = 978032088.

The previous prime is 1222540097. The next prime is 1222540139. The reversal of 1222540115 is 5110452221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5110452221 = 7 ⋅730064603.

It is a cyclic number.

It is not a de Polignac number, because 1222540115 - 2⁸ = 1222539859 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, 122254007 + ... + 122254016.

It is an arithmetic number, because the mean of its divisors is an integer number (366762036).

Almost surely, 2^1222540115 is an apocalyptic number.

1222540115 is a deficient number, since it is larger than the sum of its proper divisors (244508029).

1222540115 is an equidigital number, since it uses as much as digits as its factorization.

1222540115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244508028.

The product of its (nonzero) digits is 800, while the sum is 23.

The square root of 1222540115 is about 34964.8411264802. The cubic root of 1222540115 is about 1069.2707975994.

Adding to 1222540115 its reverse (5110452221), we get a palindrome (6332992336).

The spelling of 1222540115 in words is "one billion, two hundred twenty-two million, five hundred forty thousand, one hundred fifteen".