1228641 has 8 divisors (see below), whose sum is σ = 1734624. Its totient is φ = 770880.

The previous prime is 1228631. The next prime is 1228651. The reversal of 1228641 is 1468221.

It is an interprime number because it is at equal distance from previous prime (1228631) and next prime (1228651).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1228641 - 2¹¹ = 1226593 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1228631) 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, 11995 + ... + 12096.

It is an arithmetic number, because the mean of its divisors is an integer number (216828).

2^1228641 is an apocalyptic number.

It is an amenable number.

1228641 is a deficient number, since it is larger than the sum of its proper divisors (505983).

1228641 is a wasteful number, since it uses less digits than its factorization.

1228641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24111.

The product of its digits is 768, while the sum is 24.

The square root of 1228641 is about 1108.4407967952. The cubic root of 1228641 is about 107.1046520292.

The spelling of 1228641 in words is "one million, two hundred twenty-eight thousand, six hundred forty-one".