1217001 has 4 divisors (see below), whose sum is σ = 1622672. Its totient is φ = 811332.

The previous prime is 1216997. The next prime is 1217009. The reversal of 1217001 is 1007121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1217001 - 2² = 1216997 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1217009) 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, 202831 + ... + 202836.

It is an arithmetic number, because the mean of its divisors is an integer number (405668).

2^1217001 is an apocalyptic number.

It is an amenable number.

1217001 is a deficient number, since it is larger than the sum of its proper divisors (405671).

1217001 is an equidigital number, since it uses as much as digits as its factorization.

1217001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405670.

The product of its (nonzero) digits is 14, while the sum is 12.

The square root of 1217001 is about 1103.1776828780. The cubic root of 1217001 is about 106.7653459648.

The spelling of 1217001 in words is "one million, two hundred seventeen thousand, one".