1228161 has 8 divisors (see below), whose sum is σ = 1786464. Its totient is φ = 744320.

The previous prime is 1228159. The next prime is 1228163. The reversal of 1228161 is 1618221.

It is an interprime number because it is at equal distance from previous prime (1228159) and next prime (1228163).

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 1228161 - 2¹ = 1228159 is a prime.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1228163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18576 + ... + 18641.

It is an arithmetic number, because the mean of its divisors is an integer number (223308).

2^1228161 is an apocalyptic number.

1228161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1228161 is a deficient number, since it is larger than the sum of its proper divisors (558303).

1228161 is a wasteful number, since it uses less digits than its factorization.

1228161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37231.

The product of its digits is 192, while the sum is 21.

The square root of 1228161 is about 1108.2242552841. The cubic root of 1228161 is about 107.0907024895.

The spelling of 1228161 in words is "one million, two hundred twenty-eight thousand, one hundred sixty-one".