1167921 has 6 divisors (see below), whose sum is σ = 1687010. Its totient is φ = 778608.

The previous prime is 1167919. The next prime is 1167937. The reversal of 1167921 is 1297611.

It can be written as a sum of positive squares in only one way, i.e., 1166400 + 1521 = 1080^2 + 39^2 .

It is not a de Polignac number, because 1167921 - 2¹ = 1167919 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1167421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64876 + ... + 64893.

2^1167921 is an apocalyptic number.

It is an amenable number.

1167921 is a deficient number, since it is larger than the sum of its proper divisors (519089).

1167921 is a wasteful number, since it uses less digits than its factorization.

1167921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129775 (or 129772 counting only the distinct ones).

The product of its digits is 756, while the sum is 27.

The square root of 1167921 is about 1080.7039372557. The cubic root of 1167921 is about 105.3103741643.

The spelling of 1167921 in words is "one million, one hundred sixty-seven thousand, nine hundred twenty-one".