1216173 has 16 divisors (see below), whose sum is σ = 1918080. Its totient is φ = 670656.

The previous prime is 1216151. The next prime is 1216177. The reversal of 1216173 is 3716121.

It is not a de Polignac number, because 1216173 - 2⁶ = 1216109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 390 + ... + 1607.

It is an arithmetic number, because the mean of its divisors is an integer number (119880).

2^1216173 is an apocalyptic number.

It is an amenable number.

1216173 is a deficient number, since it is larger than the sum of its proper divisors (701907).

1216173 is a wasteful number, since it uses less digits than its factorization.

1216173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036.

The product of its digits is 252, while the sum is 21.

The square root of 1216173 is about 1102.8023394970. The cubic root of 1216173 is about 106.7411274795.

The spelling of 1216173 in words is "one million, two hundred sixteen thousand, one hundred seventy-three".