1229555 has 4 divisors (see below), whose sum is σ = 1475472. Its totient is φ = 983640.

The previous prime is 1229531. The next prime is 1229561. The reversal of 1229555 is 5559221.

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

It is not a de Polignac number, because 1229555 - 2¹² = 1225459 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122951 + ... + 122960.

It is an arithmetic number, because the mean of its divisors is an integer number (368868).

2^1229555 is an apocalyptic number.

1229555 is a deficient number, since it is larger than the sum of its proper divisors (245917).

1229555 is an equidigital number, since it uses as much as digits as its factorization.

1229555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245916.

The product of its digits is 4500, while the sum is 29.

The square root of 1229555 is about 1108.8530109983. The cubic root of 1229555 is about 107.1312042353.

The spelling of 1229555 in words is "one million, two hundred twenty-nine thousand, five hundred fifty-five".