1217996 has 24 divisors (see below), whose sum is σ = 2340240. Its totient is φ = 551232.

The previous prime is 1217989. The next prime is 1218017. The reversal of 1217996 is 6997121.

1217996 = T₂₉₃ + T₂₉₄ + ... + T₃₁₈.

It is a plaindrome in base 9.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2870 + ... + 3266.

It is an arithmetic number, because the mean of its divisors is an integer number (97510).

2^1217996 is an apocalyptic number.

It is an amenable number.

1217996 is a deficient number, since it is larger than the sum of its proper divisors (1122244).

1217996 is a wasteful number, since it uses less digits than its factorization.

1217996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473 (or 471 counting only the distinct ones).

The product of its digits is 6804, while the sum is 35.

The square root of 1217996 is about 1103.6285607033. The cubic root of 1217996 is about 106.7944345690.

The spelling of 1217996 in words is "one million, two hundred seventeen thousand, nine hundred ninety-six".