1069721 has 4 divisors (see below), whose sum is σ = 1078272. Its totient is φ = 1061172.

The previous prime is 1069697. The next prime is 1069727. The reversal of 1069721 is 1279601.

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 a de Polignac number, because none of the positive numbers 2^k-1069721 is a prime.

It is a super-2 number, since 2×1069721² = 2288606035682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1069727) 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, 4085 + ... + 4338.

It is an arithmetic number, because the mean of its divisors is an integer number (269568).

2^1069721 is an apocalyptic number.

It is an amenable number.

1069721 is a deficient number, since it is larger than the sum of its proper divisors (8551).

1069721 is an equidigital number, since it uses as much as digits as its factorization.

1069721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8550.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 1069721 is about 1034.2731747464. The cubic root of 1069721 is about 102.2720215679.

The spelling of 1069721 in words is "one million, sixty-nine thousand, seven hundred twenty-one".