1217801 has 8 divisors (see below), whose sum is σ = 1324680. Its totient is φ = 1112832.

The previous prime is 1217771. The next prime is 1217809. The reversal of 1217801 is 1087121.

It can be written as a sum of positive squares in 4 ways, for example, as 10000 + 1207801 = 100^2 + 1099^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1217801 - 2¹⁰ = 1216777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1217809) 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, 1055 + ... + 1883.

It is an arithmetic number, because the mean of its divisors is an integer number (165585).

2^1217801 is an apocalyptic number.

It is an amenable number.

1217801 is a deficient number, since it is larger than the sum of its proper divisors (106879).

1217801 is a wasteful number, since it uses less digits than its factorization.

1217801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955.

The product of its (nonzero) digits is 112, while the sum is 20.

The square root of 1217801 is about 1103.5402122261. The cubic root of 1217801 is about 106.7887350358.

The spelling of 1217801 in words is "one million, two hundred seventeen thousand, eight hundred one".