1163921 has 8 divisors (see below), whose sum is σ = 1336800. Its totient is φ = 1002240.

The previous prime is 1163891. The next prime is 1163923. The reversal of 1163921 is 1293611.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1163921 - 2¹⁰ = 1162897 is a prime.

It is a super-3 number, since 3×1163921³ = 4730333566323236883, which contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1163923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2576 + ... + 2993.

It is an arithmetic number, because the mean of its divisors is an integer number (167100).

2^1163921 is an apocalyptic number.

1163921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1163921 is a deficient number, since it is larger than the sum of its proper divisors (172879).

1163921 is a wasteful number, since it uses less digits than its factorization.

1163921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5599.

The product of its digits is 324, while the sum is 23.

The square root of 1163921 is about 1078.8517043598. The cubic root of 1163921 is about 105.1900111958.

The spelling of 1163921 in words is "one million, one hundred sixty-three thousand, nine hundred twenty-one".