1223978 has 8 divisors (see below), whose sum is σ = 2098272. Its totient is φ = 524556.

The previous prime is 1223977. The next prime is 1223987. The reversal of 1223978 is 8793221.

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 (1223977) 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, 43700 + ... + 43727.

It is an arithmetic number, because the mean of its divisors is an integer number (262284).

2^1223978 is an apocalyptic number.

1223978 is a deficient number, since it is larger than the sum of its proper divisors (874294).

1223978 is an equidigital number, since it uses as much as digits as its factorization.

1223978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87436.

The product of its digits is 6048, while the sum is 32.

The square root of 1223978 is about 1106.3353921845. The cubic root of 1223978 is about 106.9689839354.

The spelling of 1223978 in words is "one million, two hundred twenty-three thousand, nine hundred seventy-eight".