1220278 has 8 divisors (see below), whose sum is σ = 1835568. Its totient is φ = 608424.

The previous prime is 1220257. The next prime is 1220309. The reversal of 1220278 is 8720221.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400 + ... + 1612.

It is an arithmetic number, because the mean of its divisors is an integer number (229446).

2^1220278 is an apocalyptic number.

1220278 is a deficient number, since it is larger than the sum of its proper divisors (615290).

1220278 is a wasteful number, since it uses less digits than its factorization.

1220278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1718.

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 1220278 is about 1104.6619392375. The cubic root of 1220278 is about 106.8610885533.

Adding to 1220278 its reverse (8720221), we get a palindrome (9940499).

The spelling of 1220278 in words is "one million, two hundred twenty thousand, two hundred seventy-eight".