1121025261 has 8 divisors (see below), whose sum is σ = 1495653280. Its totient is φ = 746873712.

The previous prime is 1121025259. The next prime is 1121025263. The reversal of 1121025261 is 1625201211.

It is an interprime number because it is at equal distance from previous prime (1121025259) and next prime (1121025263).

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

It is not a de Polignac number, because 1121025261 - 2¹ = 1121025259 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 (1121025263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113590 + ... + 123063.

It is an arithmetic number, because the mean of its divisors is an integer number (186956660).

Almost surely, 2^1121025261 is an apocalyptic number.

It is an amenable number.

1121025261 is a deficient number, since it is larger than the sum of its proper divisors (374628019).

1121025261 is a wasteful number, since it uses less digits than its factorization.

1121025261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238235.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 1121025261 is about 33481.7153234418. The cubic root of 1121025261 is about 1038.8156083508.

Adding to 1121025261 its reverse (1625201211), we get a palindrome (2746226472).

The spelling of 1121025261 in words is "one billion, one hundred twenty-one million, twenty-five thousand, two hundred sixty-one".