1212778 has 8 divisors (see below), whose sum is σ = 2079072. Its totient is φ = 519756.

The previous prime is 1212773. The next prime is 1212781. The reversal of 1212778 is 8772121.

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

It is not an unprimeable number, because it can be changed into a prime (1212773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43300 + ... + 43327.

It is an arithmetic number, because the mean of its divisors is an integer number (259884).

2^1212778 is an apocalyptic number.

1212778 is a deficient number, since it is larger than the sum of its proper divisors (866294).

1212778 is an equidigital number, since it uses as much as digits as its factorization.

1212778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86636.

The product of its digits is 1568, while the sum is 28.

The square root of 1212778 is about 1101.2620033398. The cubic root of 1212778 is about 106.6417107416.

Adding to 1212778 its reverse (8772121), we get a palindrome (9984899).

The spelling of 1212778 in words is "one million, two hundred twelve thousand, seven hundred seventy-eight".