1228916 has 12 divisors (see below), whose sum is σ = 2316132. Its totient is φ = 567168.

The previous prime is 1228907. The next prime is 1228919. The reversal of 1228916 is 6198221.

It can be written as a sum of positive squares in 2 ways, for example, as 672400 + 556516 = 820^2 + 746^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11765 + ... + 11868.

It is an arithmetic number, because the mean of its divisors is an integer number (193011).

2^1228916 is an apocalyptic number.

It is an amenable number.

1228916 is a deficient number, since it is larger than the sum of its proper divisors (1087216).

1228916 is a wasteful number, since it uses less digits than its factorization.

1228916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23650 (or 23648 counting only the distinct ones).

The product of its digits is 1728, while the sum is 29.

The square root of 1228916 is about 1108.5648379775. The cubic root of 1228916 is about 107.1126423160.

The spelling of 1228916 in words is "one million, two hundred twenty-eight thousand, nine hundred sixteen".