1227978 has 24 divisors (see below), whose sum is σ = 2817828. Its totient is φ = 385152.

The previous prime is 1227977. The next prime is 1227979. The reversal of 1227978 is 8797221.

It is an interprime number because it is at equal distance from previous prime (1227977) and next prime (1227979).

It can be written as a sum of positive squares in 2 ways, for example, as 1096209 + 131769 = 1047^2 + 363^2 .

It is not an unprimeable number, because it can be changed into a prime (1227973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1701 + ... + 2312.

2^1227978 is an apocalyptic number.

1227978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1227978 is an abundant number, since it is smaller than the sum of its proper divisors (1589850).

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

1227978 is a wasteful number, since it uses less digits than its factorization.

1227978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4038 (or 4035 counting only the distinct ones).

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

The square root of 1227978 is about 1108.1416876916. The cubic root of 1227978 is about 107.0853832705.

It can be divided in two parts, 122 and 7978, that added together give a square (8100 = 90²).

The spelling of 1227978 in words is "one million, two hundred twenty-seven thousand, nine hundred seventy-eight".