1130921 has 4 divisors (see below), whose sum is σ = 1233744. Its totient is φ = 1028100.

The previous prime is 1130863. The next prime is 1130929. The reversal of 1130921 is 1290311.

It is a happy number.

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 1130921 - 2¹⁰ = 1129897 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1130921.

It is not an unprimeable number, because it can be changed into a prime (1130929) 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, 51395 + ... + 51416.

It is an arithmetic number, because the mean of its divisors is an integer number (308436).

2^1130921 is an apocalyptic number.

1130921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1130921 is a deficient number, since it is larger than the sum of its proper divisors (102823).

1130921 is a wasteful number, since it uses less digits than its factorization.

1130921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102822.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 1130921 is about 1063.4476949996. The cubic root of 1130921 is about 104.1863338509.

The spelling of 1130921 in words is "one million, one hundred thirty thousand, nine hundred twenty-one".