1121025253 has 4 divisors (see below), whose sum is σ = 1126833868. Its totient is φ = 1115216640.

The previous prime is 1121025209. The next prime is 1121025259. The reversal of 1121025253 is 3525201211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3525201211 = 7 ⋅503600173.

It can be written as a sum of positive squares in 2 ways, for example, as 330403329 + 790621924 = 18177^2 + 28118^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121025253 - 2²¹ = 1118928101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121025259) 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, 2904018 + ... + 2904403.

It is an arithmetic number, because the mean of its divisors is an integer number (281708467).

Almost surely, 2^1121025253 is an apocalyptic number.

It is an amenable number.

1121025253 is a deficient number, since it is larger than the sum of its proper divisors (5808615).

1121025253 is an equidigital number, since it uses as much as digits as its factorization.

1121025253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5808614.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1121025253 is about 33481.7152039736. The cubic root of 1121025253 is about 1038.8156058797.

Adding to 1121025253 its reverse (3525201211), we get a palindrome (4646226464).

It can be divided in two parts, 11210 and 25253, that added together give a palindrome (36463).

The spelling of 1121025253 in words is "one billion, one hundred twenty-one million, twenty-five thousand, two hundred fifty-three".