1069921 has 2 divisors, whose sum is σ = 1069922. Its totient is φ = 1069920.

The previous prime is 1069919. The next prime is 1069927. The reversal of 1069921 is 1299601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 929296 + 140625 = 964^2 + 375^2 .

It is an emirp because it is prime and its reverse (1299601) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1069921 - 2¹ = 1069919 is a prime.

It is a super-2 number, since 2×1069921² = 2289461892482, which contains 22 as substring.

Together with 1069919, it forms a pair of twin primes.

It is an Ulam number.

1069921 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1069921.

It is not a weakly prime, because it can be changed into another prime (1069927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 534960 + 534961.

It is an arithmetic number, because the mean of its divisors is an integer number (534961).

2^1069921 is an apocalyptic number.

It is an amenable number.

1069921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1069921 is an equidigital number, since it uses as much as digits as its factorization.

1069921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 1069921 is about 1034.3698564827. The cubic root of 1069921 is about 102.2783949212.

The spelling of 1069921 in words is "one million, sixty-nine thousand, nine hundred twenty-one".