1557227 has 4 divisors (see below), whose sum is σ = 1779696. Its totient is φ = 1334760.

The previous prime is 1557211. The next prime is 1557239. The reversal of 1557227 is 7227551.

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

It is not a de Polignac number, because 1557227 - 2⁴ = 1557211 is a prime.

It is a d-powerful number, because it can be written as 1 + 5² + 5⁸ + 7³ + 2³ + 2²⁰ + 7⁶ .

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 1557227.

It is not an unprimeable number, because it can be changed into a prime (1557247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111224 + ... + 111237.

It is an arithmetic number, because the mean of its divisors is an integer number (444924).

2^1557227 is an apocalyptic number.

1557227 is a deficient number, since it is larger than the sum of its proper divisors (222469).

1557227 is an equidigital number, since it uses as much as digits as its factorization.

1557227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222468.

The product of its digits is 4900, while the sum is 29.

The square root of 1557227 is about 1247.8890175012. The cubic root of 1557227 is about 115.9090398704.

The spelling of 1557227 in words is "one million, five hundred fifty-seven thousand, two hundred twenty-seven".