10001251265 has 4 divisors (see below), whose sum is σ = 12001501524. Its totient is φ = 8001001008.

The previous prime is 10001251231. The next prime is 10001251289. The reversal of 10001251265 is 56215210001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4268792896 + 5732458369 = 65336^2 + 75713^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10001251265 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10001251265.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1000125122 + ... + 1000125131.

It is an arithmetic number, because the mean of its divisors is an integer number (3000375381).

Almost surely, 2^10001251265 is an apocalyptic number.

It is an amenable number.

10001251265 is a deficient number, since it is larger than the sum of its proper divisors (2000250259).

10001251265 is an equidigital number, since it uses as much as digits as its factorization.

10001251265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000250258.

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 10001251265 its reverse (56215210001), we get a palindrome (66216461266).

The spelling of 10001251265 in words is "ten billion, one million, two hundred fifty-one thousand, two hundred sixty-five".