1219555 has 4 divisors (see below), whose sum is σ = 1463472. Its totient is φ = 975640.

The previous prime is 1219549. The next prime is 1219577. The reversal of 1219555 is 5559121.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-1219555 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, 121951 + ... + 121960.

It is an arithmetic number, because the mean of its divisors is an integer number (365868).

2^1219555 is an apocalyptic number.

1219555 is a deficient number, since it is larger than the sum of its proper divisors (243917).

1219555 is an equidigital number, since it uses as much as digits as its factorization.

1219555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243916.

The product of its digits is 2250, while the sum is 28.

The square root of 1219555 is about 1104.3346413112. The cubic root of 1219555 is about 106.8399797484.

The spelling of 1219555 in words is "one million, two hundred nineteen thousand, five hundred fifty-five".