1121129 has 4 divisors (see below), whose sum is σ = 1123584. Its totient is φ = 1118676.

The previous prime is 1121101. The next prime is 1121143. The reversal of 1121129 is 9211211.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9211211 = 1669 ⋅5519.

It is a cyclic number.

It is not a de Polignac number, because 1121129 - 2¹² = 1117033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121179) 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, 317 + ... + 1530.

It is an arithmetic number, because the mean of its divisors is an integer number (280896).

2^1121129 is an apocalyptic number.

It is an amenable number.

1121129 is a deficient number, since it is larger than the sum of its proper divisors (2455).

1121129 is an equidigital number, since it uses as much as digits as its factorization.

1121129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2454.

The product of its digits is 36, while the sum is 17.

The square root of 1121129 is about 1058.8337924339. The cubic root of 1121129 is about 103.8847651152.

The spelling of 1121129 in words is "one million, one hundred twenty-one thousand, one hundred twenty-nine".