1591228 has 6 divisors (see below), whose sum is σ = 2784656. Its totient is φ = 795612.

The previous prime is 1591211. The next prime is 1591229. The reversal of 1591228 is 8221951.

It is a junction number, because it is equal to n+sod(n) for n = 1591196 and 1591205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1591229) 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 as a sum of consecutive naturals, namely, 198900 + ... + 198907.

2^1591228 is an apocalyptic number.

It is an amenable number.

1591228 is a deficient number, since it is larger than the sum of its proper divisors (1193428).

1591228 is a wasteful number, since it uses less digits than its factorization.

1591228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397811 (or 397809 counting only the distinct ones).

The product of its digits is 1440, while the sum is 28.

The square root of 1591228 is about 1261.4388609838. The cubic root of 1591228 is about 116.7465720175.

The spelling of 1591228 in words is "one million, five hundred ninety-one thousand, two hundred twenty-eight".