1121251 has 4 divisors (see below), whose sum is σ = 1123632. Its totient is φ = 1118872.

The previous prime is 1121249. The next prime is 1121257. The reversal of 1121251 is 1521211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1121251 - 2¹ = 1121249 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220 + ... + 1513.

It is an arithmetic number, because the mean of its divisors is an integer number (280908).

2^1121251 is an apocalyptic number.

1121251 is a deficient number, since it is larger than the sum of its proper divisors (2381).

1121251 is an equidigital number, since it uses as much as digits as its factorization.

1121251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2380.

The product of its digits is 20, while the sum is 13.

The square root of 1121251 is about 1058.8914014194. The cubic root of 1121251 is about 103.8885331864. Note that the first 3 decimals are identical.

Adding to 1121251 its reverse (1521211), we get a palindrome (2642462).

The spelling of 1121251 in words is "one million, one hundred twenty-one thousand, two hundred fifty-one".