1265001264015 has 16 divisors (see below), whose sum is σ = 2024016739296. Its totient is φ = 674662435200.

The previous prime is 1265001263983. The next prime is 1265001264041. The reversal of 1265001264015 is 5104621005621.

It is not a de Polignac number, because 1265001264015 - 2⁵ = 1265001263983 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2921445 + ... + 3326385.

It is an arithmetic number, because the mean of its divisors is an integer number (126501046206).

Almost surely, 2^{1265001264015} is an apocalyptic number.

1265001264015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1265001264015 is a deficient number, since it is larger than the sum of its proper divisors (759015475281).

1265001264015 is a wasteful number, since it uses less digits than its factorization.

1265001264015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613210.

The product of its (nonzero) digits is 14400, while the sum is 33.

Adding to 1265001264015 its reverse (5104621005621), we get a palindrome (6369622269636).

The spelling of 1265001264015 in words is "one trillion, two hundred sixty-five billion, one million, two hundred sixty-four thousand, fifteen".