1228065 has 32 divisors (see below), whose sum is σ = 2150400. Its totient is φ = 596160.

The previous prime is 1228021. The next prime is 1228091. The reversal of 1228065 is 5608221.

1228065 = T₃₅₀ + T₃₅₁ + ... + T₃₆₈.

1228065 = 16² + 17² + ... + 154².

It is not a de Polignac number, because 1228065 - 2⁶ = 1228001 is a prime.

It is a super-3 number, since 3×1228065³ = 5556295273335523875, which contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8766 + ... + 8904.

It is an arithmetic number, because the mean of its divisors is an integer number (67200).

2^1228065 is an apocalyptic number.

1228065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1228065 is a deficient number, since it is larger than the sum of its proper divisors (922335).

1228065 is a wasteful number, since it uses less digits than its factorization.

1228065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 1228065 is about 1108.1809419043. The cubic root of 1228065 is about 107.0879121454.

The spelling of 1228065 in words is "one million, two hundred twenty-eight thousand, sixty-five".