1223155 has 8 divisors (see below), whose sum is σ = 1475712. Its totient is φ = 973248.

The previous prime is 1223149. The next prime is 1223161. The reversal of 1223155 is 5513221.

It is an interprime number because it is at equal distance from previous prime (1223149) and next prime (1223161).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1223155 - 2⁹ = 1222643 is a prime.

It is a super-2 number, since 2×1223155² = 2992216308050, which contains 22 as substring.

It is a Duffinian number.

1223155 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 567 + ... + 1663.

It is an arithmetic number, because the mean of its divisors is an integer number (184464).

2^1223155 is an apocalyptic number.

1223155 is a deficient number, since it is larger than the sum of its proper divisors (252557).

1223155 is a wasteful number, since it uses less digits than its factorization.

1223155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325.

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

The square root of 1223155 is about 1105.9633809489. The cubic root of 1223155 is about 106.9450033266.

Adding to 1223155 its reverse (5513221), we get a palindrome (6736376).

It can be divided in two parts, 1223 and 155, that added together give a triangular number (1378 = T₅₂).

The spelling of 1223155 in words is "one million, two hundred twenty-three thousand, one hundred fifty-five".