1221078 has 16 divisors (see below), whose sum is σ = 2465136. Its totient is φ = 403200.

The previous prime is 1221061. The next prime is 1221079. The reversal of 1221078 is 8701221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 223 + ... + 1578.

It is an arithmetic number, because the mean of its divisors is an integer number (154071).

2^1221078 is an apocalyptic number.

1221078 is an abundant number, since it is smaller than the sum of its proper divisors (1244058).

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

1221078 is a wasteful number, since it uses less digits than its factorization.

1221078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 1221078 is about 1105.0239816402. The cubic root of 1221078 is about 106.8844357457.

Adding to 1221078 its reverse (8701221), we get a palindrome (9922299).

The spelling of 1221078 in words is "one million, two hundred twenty-one thousand, seventy-eight".