1265015265 has 8 divisors (see below), whose sum is σ = 2024024448. Its totient is φ = 674674800.

The previous prime is 1265015261. The next prime is 1265015281. The reversal of 1265015265 is 5625105621.

1265015265 is nontrivially palindromic in base 4.

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

It is not a de Polignac number, because 1265015265 - 2² = 1265015261 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1265015261) 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, 42167161 + ... + 42167190.

It is an arithmetic number, because the mean of its divisors is an integer number (253003056).

Almost surely, 2^1265015265 is an apocalyptic number.

1265015265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1265015265 is a deficient number, since it is larger than the sum of its proper divisors (759009183).

1265015265 is an equidigital number, since it uses as much as digits as its factorization.

1265015265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84334359.

The product of its (nonzero) digits is 18000, while the sum is 33.

The square root of 1265015265 is about 35567.0530828743. The cubic root of 1265015265 is about 1081.5134431529.

The spelling of 1265015265 in words is "one billion, two hundred sixty-five million, fifteen thousand, two hundred sixty-five".