1261035113 has 8 divisors (see below), whose sum is σ = 1358313600. Its totient is φ = 1163796048.

The previous prime is 1261035107. The next prime is 1261035119. The reversal of 1261035113 is 3115301621.

It is an interprime number because it is at equal distance from previous prime (1261035107) and next prime (1261035119).

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

It is a cyclic number.

It is not a de Polignac number, because 1261035113 - 2⁶ = 1261035049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1261035119) 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, 122978 + ... + 132836.

It is an arithmetic number, because the mean of its divisors is an integer number (169789200).

Almost surely, 2^1261035113 is an apocalyptic number.

1261035113 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1261035113 is a deficient number, since it is larger than the sum of its proper divisors (97278487).

1261035113 is an equidigital number, since it uses as much as digits as its factorization.

1261035113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19711.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1261035113 is about 35511.0562078911. The cubic root of 1261035113 is about 1080.3779864069.

Adding to 1261035113 its reverse (3115301621), we get a palindrome (4376336734).

The spelling of 1261035113 in words is "one billion, two hundred sixty-one million, thirty-five thousand, one hundred thirteen".