1222015 has 4 divisors (see below), whose sum is σ = 1466424. Its totient is φ = 977608.

The previous prime is 1222003. The next prime is 1222019. The reversal of 1222015 is 5102221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5102221 = 257 ⋅19853.

It is a cyclic number.

It is not a de Polignac number, because 1222015 - 2⁹ = 1221503 is a prime.

It is a Duffinian number.

1222015 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1221986 and 1222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122197 + ... + 122206.

It is an arithmetic number, because the mean of its divisors is an integer number (366606).

2^1222015 is an apocalyptic number.

1222015 is a deficient number, since it is larger than the sum of its proper divisors (244409).

1222015 is an equidigital number, since it uses as much as digits as its factorization.

1222015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244408.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 1222015 is about 1105.4478730361. The cubic root of 1222015 is about 106.9117681820.

Adding to 1222015 its reverse (5102221), we get a palindrome (6324236).

The spelling of 1222015 in words is "one million, two hundred twenty-two thousand, fifteen".