1216753 has 4 divisors (see below), whose sum is σ = 1258740. Its totient is φ = 1174768.

The previous prime is 1216751. The next prime is 1216759. The reversal of 1216753 is 3576121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 651249 + 565504 = 807^2 + 752^2 .

It is a cyclic number.

It is not a de Polignac number, because 1216753 - 2¹ = 1216751 is a prime.

It is a Duffinian number.

1216753 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1216751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20950 + ... + 21007.

It is an arithmetic number, because the mean of its divisors is an integer number (314685).

2^1216753 is an apocalyptic number.

It is an amenable number.

1216753 is a deficient number, since it is larger than the sum of its proper divisors (41987).

1216753 is an equidigital number, since it uses as much as digits as its factorization.

1216753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41986.

The product of its digits is 1260, while the sum is 25.

The square root of 1216753 is about 1103.0652745871. The cubic root of 1216753 is about 106.7580932716.

The spelling of 1216753 in words is "one million, two hundred sixteen thousand, seven hundred fifty-three".