1223515 has 4 divisors (see below), whose sum is σ = 1468224. Its totient is φ = 978808.

The previous prime is 1223491. The next prime is 1223527. The reversal of 1223515 is 5153221.

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 1223515 - 2⁹ = 1223003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1223492 and 1223501.

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, 122347 + ... + 122356.

It is an arithmetic number, because the mean of its divisors is an integer number (367056).

2^1223515 is an apocalyptic number.

1223515 is a deficient number, since it is larger than the sum of its proper divisors (244709).

1223515 is an equidigital number, since it uses as much as digits as its factorization.

1223515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244708.

The product of its digits is 300, while the sum is 19.

The square root of 1223515 is about 1106.1261230077. The cubic root of 1223515 is about 106.9554943450.

Adding to 1223515 its reverse (5153221), we get a palindrome (6376736).

The spelling of 1223515 in words is "one million, two hundred twenty-three thousand, five hundred fifteen".