1001320265 has 16 divisors (see below), whose sum is σ = 1356022080. Its totient is φ = 703120320.

The previous prime is 1001320219. The next prime is 1001320267. The reversal of 1001320265 is 5620231001.

It is not a de Polignac number, because 1001320265 - 2¹⁴ = 1001303881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001320267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312299 + ... + 315488.

It is an arithmetic number, because the mean of its divisors is an integer number (84751380).

Almost surely, 2^1001320265 is an apocalyptic number.

It is an amenable number.

1001320265 is a deficient number, since it is larger than the sum of its proper divisors (354701815).

1001320265 is a wasteful number, since it uses less digits than its factorization.

1001320265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627832.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 1001320265 is about 31643.6449385971. The cubic root of 1001320265 is about 1000.4398947975.

Adding to 1001320265 its reverse (5620231001), we get a palindrome (6621551266).

The spelling of 1001320265 in words is "one billion, one million, three hundred twenty thousand, two hundred sixty-five".