1229778 has 24 divisors (see below), whose sum is σ = 2907216. Its totient is φ = 372600.

The previous prime is 1229773. The next prime is 1229783. The reversal of 1229778 is 8779221.

It is an interprime number because it is at equal distance from previous prime (1229773) and next prime (1229783).

It is a d-powerful number, because it can be written as 1 + 2¹² + 2²⁰ + 9⁵ + 7³ + 7⁶ + 8² .

It is not an unprimeable number, because it can be changed into a prime (1229773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2908 + ... + 3303.

It is an arithmetic number, because the mean of its divisors is an integer number (121134).

2^1229778 is an apocalyptic number.

1229778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1229778 is an abundant number, since it is smaller than the sum of its proper divisors (1677438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1229778 is a wasteful number, since it uses less digits than its factorization.

1229778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6230 (or 6227 counting only the distinct ones).

The product of its digits is 14112, while the sum is 36.

The square root of 1229778 is about 1108.9535607950. The cubic root of 1229778 is about 107.1376805118.

The spelling of 1229778 in words is "one million, two hundred twenty-nine thousand, seven hundred seventy-eight".