1265630011 has 8 divisors (see below), whose sum is σ = 1276015104. Its totient is φ = 1255282560.

The previous prime is 1265629979. The next prime is 1265630017. The reversal of 1265630011 is 1100365621.

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 1265630011 - 2⁵ = 1265629979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1265630017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60195 + ... + 78451.

It is an arithmetic number, because the mean of its divisors is an integer number (159501888).

Almost surely, 2^1265630011 is an apocalyptic number.

1265630011 is a deficient number, since it is larger than the sum of its proper divisors (10385093).

1265630011 is a wasteful number, since it uses less digits than its factorization.

1265630011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18821.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 1265630011 is about 35575.6941042617. The cubic root of 1265630011 is about 1081.6886053065.

Adding to 1265630011 its reverse (1100365621), we get a palindrome (2365995632).

The spelling of 1265630011 in words is "one billion, two hundred sixty-five million, six hundred thirty thousand, eleven".