1265001501264 has 20 divisors (see below), whose sum is σ = 3267920545056. Its totient is φ = 421667167072.

The previous prime is 1265001501251. The next prime is 1265001501287. The reversal of 1265001501264 is 4621051005621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13177098924 + ... + 13177099019.

Almost surely, 2^{1265001501264} is an apocalyptic number.

It is an amenable number.

1265001501264 is an abundant number, since it is smaller than the sum of its proper divisors (2002919043792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1265001501264 is a wasteful number, since it uses less digits than its factorization.

1265001501264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26354197954 (or 26354197948 counting only the distinct ones).

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

Adding to 1265001501264 its reverse (4621051005621), we get a palindrome (5886052506885).

The spelling of 1265001501264 in words is "one trillion, two hundred sixty-five billion, one million, five hundred one thousand, two hundred sixty-four".