1170021 has 8 divisors (see below), whose sum is σ = 1583584. Its totient is φ = 768240.

The previous prime is 1170019. The next prime is 1170023. The reversal of 1170021 is 1200711.

It is an interprime number because it is at equal distance from previous prime (1170019) and next prime (1170023).

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

It is not a de Polignac number, because 1170021 - 2¹ = 1170019 is a prime.

It is a Duffinian number.

1170021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1169979 and 1170006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1170023) 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 7 ways as a sum of consecutive naturals, for example, 2710 + ... + 3111.

It is an arithmetic number, because the mean of its divisors is an integer number (197948).

2^1170021 is an apocalyptic number.

It is an amenable number.

1170021 is a deficient number, since it is larger than the sum of its proper divisors (413563).

1170021 is an equidigital number, since it uses as much as digits as its factorization.

1170021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5891.

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

The square root of 1170021 is about 1081.6750898491. The cubic root of 1170021 is about 105.3734547349.

Adding to 1170021 its reverse (1200711), we get a palindrome (2370732).

The spelling of 1170021 in words is "one million, one hundred seventy thousand, twenty-one".