1227155 has 8 divisors (see below), whose sum is σ = 1490832. Its totient is φ = 969568.

The previous prime is 1227151. The next prime is 1227157. The reversal of 1227155 is 5517221.

It is a happy number.

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 1227155 - 2² = 1227151 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1227155.

It is not an unprimeable number, because it can be changed into a prime (1227151) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1064 + ... + 1893.

It is an arithmetic number, because the mean of its divisors is an integer number (186354).

2^1227155 is an apocalyptic number.

1227155 is a deficient number, since it is larger than the sum of its proper divisors (263677).

1227155 is an equidigital number, since it uses as much as digits as its factorization.

1227155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3045.

The product of its digits is 700, while the sum is 23.

The square root of 1227155 is about 1107.7702830461. The cubic root of 1227155 is about 107.0614547835.

The spelling of 1227155 in words is "one million, two hundred twenty-seven thousand, one hundred fifty-five".