1113785261 has 4 divisors (see below), whose sum is σ = 1118692032. Its totient is φ = 1108878492.

The previous prime is 1113785251. The next prime is 1113785293. The reversal of 1113785261 is 1625873111.

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 a de Polignac number, because none of the positive numbers 2^k-1113785261 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 (1113785221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2453045 + ... + 2453498.

It is an arithmetic number, because the mean of its divisors is an integer number (279673008).

Almost surely, 2^1113785261 is an apocalyptic number.

It is an amenable number.

1113785261 is a deficient number, since it is larger than the sum of its proper divisors (4906771).

1113785261 is an equidigital number, since it uses as much as digits as its factorization.

1113785261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4906770.

The product of its digits is 10080, while the sum is 35.

The square root of 1113785261 is about 33373.4214757792. The cubic root of 1113785261 is about 1036.5744234854.

The spelling of 1113785261 in words is "one billion, one hundred thirteen million, seven hundred eighty-five thousand, two hundred sixty-one".