1071321 has 4 divisors (see below), whose sum is σ = 1428432. Its totient is φ = 714212.

The previous prime is 1071313. The next prime is 1071337. The reversal of 1071321 is 1231701.

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 a cyclic number.

It is not a de Polignac number, because 1071321 - 2³ = 1071313 is a prime.

It is a super-2 number, since 2×1071321² = 2295457370082, which contains 22 as substring.

It is a D-number.

It is a Curzon number.

1071321 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1071321.

It is not an unprimeable number, because it can be changed into a prime (1071311) 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, 178551 + ... + 178556.

It is an arithmetic number, because the mean of its divisors is an integer number (357108).

2^1071321 is an apocalyptic number.

It is an amenable number.

1071321 is a deficient number, since it is larger than the sum of its proper divisors (357111).

1071321 is an equidigital number, since it uses as much as digits as its factorization.

1071321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357110.

The product of its (nonzero) digits is 42, while the sum is 15.

The square root of 1071321 is about 1035.0463757726. The cubic root of 1071321 is about 102.3229861709.

The spelling of 1071321 in words is "one million, seventy-one thousand, three hundred twenty-one".