1216650 has 24 divisors (see below), whose sum is σ = 3017664. Its totient is φ = 324400.

The previous prime is 1216619. The next prime is 1216681. The reversal of 1216650 is 566121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1216619) and next prime (1216681).

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3906 + ... + 4205.

It is an arithmetic number, because the mean of its divisors is an integer number (125736).

2^1216650 is an apocalyptic number.

1216650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216650 is an abundant number, since it is smaller than the sum of its proper divisors (1801014).

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

1216650 is a wasteful number, since it uses less digits than its factorization.

1216650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8126 (or 8121 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1216650 is about 1103.0185855188. The cubic root of 1216650 is about 106.7550807747.

The spelling of 1216650 in words is "one million, two hundred sixteen thousand, six hundred fifty".