1228965 has 8 divisors (see below), whose sum is σ = 1966368. Its totient is φ = 655440.

The previous prime is 1228963. The next prime is 1228987. The reversal of 1228965 is 5698221.

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

It is not a de Polignac number, because 1228965 - 2¹ = 1228963 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228961) 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, 40951 + ... + 40980.

It is an arithmetic number, because the mean of its divisors is an integer number (245796).

2^1228965 is an apocalyptic number.

1228965 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1228965 is a deficient number, since it is larger than the sum of its proper divisors (737403).

1228965 is an equidigital number, since it uses as much as digits as its factorization.

1228965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81939.

The product of its digits is 8640, while the sum is 33.

The square root of 1228965 is about 1108.5869384040. The cubic root of 1228965 is about 107.1140659148.

The spelling of 1228965 in words is "one million, two hundred twenty-eight thousand, nine hundred sixty-five".