1171021 has 4 divisors (see below), whose sum is σ = 1177344. Its totient is φ = 1164700.

The previous prime is 1170979. The next prime is 1171031. The reversal of 1171021 is 1201711.

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: 1201711 = 7 ⋅171673.

It is a cyclic number.

It is not a de Polignac number, because 1171021 - 2¹⁷ = 1039949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1170992 and 1171010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171031) 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, 2875 + ... + 3256.

It is an arithmetic number, because the mean of its divisors is an integer number (294336).

2^1171021 is an apocalyptic number.

It is an amenable number.

1171021 is a deficient number, since it is larger than the sum of its proper divisors (6323).

1171021 is an equidigital number, since it uses as much as digits as its factorization.

1171021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6322.

The product of its (nonzero) digits is 14, while the sum is 13.

The square root of 1171021 is about 1082.1372371377. The cubic root of 1171021 is about 105.4034665747.

Adding to 1171021 its reverse (1201711), we get a palindrome (2372732).

The spelling of 1171021 in words is "one million, one hundred seventy-one thousand, twenty-one".