1216988 has 24 divisors (see below), whose sum is σ = 2284800. Its totient is φ = 565488.

The previous prime is 1216987. The next prime is 1216997. The reversal of 1216988 is 8896121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216987) 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, 4973 + ... + 5211.

It is an arithmetic number, because the mean of its divisors is an integer number (95200).

2^1216988 is an apocalyptic number.

It is an amenable number.

1216988 is a deficient number, since it is larger than the sum of its proper divisors (1067812).

1216988 is a wasteful number, since it uses less digits than its factorization.

1216988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329 (or 327 counting only the distinct ones).

The product of its digits is 6912, while the sum is 35.

The square root of 1216988 is about 1103.1717907923. The cubic root of 1216988 is about 106.7649658078.

It can be divided in two parts, 121 and 6988, that multiplied together give a palindrome (845548).

The spelling of 1216988 in words is "one million, two hundred sixteen thousand, nine hundred eighty-eight".