1130021 has 4 divisors (see below), whose sum is σ = 1154112.
Its totient is φ = 1105932.
The previous prime is 1130011. The next prime is 1130023. The reversal of 1130021 is 1200311.
Adding to 1130021 its reverse (1200311), we get a palindrome (2330332).
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, and also an emirpimes, since its reverse is a distinct semiprime: 1200311 = 7 ⋅171473.
It is a cyclic number.
It is not a de Polignac number, because 1130021 - 26 = 1129957 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 1129990 and 1130008.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1130023) 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, 11975 + ... + 12068.
It is an arithmetic number, because the mean of its divisors is an integer number (288528).
21130021 is an apocalyptic number.
It is an amenable number.
1130021 is a deficient number, since it is larger than the sum of its proper divisors (24091).
1130021 is an equidigital number, since it uses as much as digits as its factorization.
1130021 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 24090.
The product of its (nonzero) digits is 6, while the sum is 8.
The square root of 1130021 is about 1063.0244587967.
The cubic root of 1130021 is about 104.1586889535.
The spelling of 1130021 in words is "one million, one hundred thirty thousand, twenty-one".