1272201767520 has 48 divisors (see below), whose sum is σ = 4007435569200. Its totient is φ = 339253804544.

The previous prime is 1272201767519. The next prime is 1272201767527. The reversal of 1272201767520 is 257671022721.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272201767527) 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, 1325209695 + ... + 1325210654.

It is an arithmetic number, because the mean of its divisors is an integer number (83488241025).

Almost surely, 2^{1272201767520} is an apocalyptic number.

1272201767520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1272201767520 is an abundant number, since it is smaller than the sum of its proper divisors (2735233801680).

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

1272201767520 is a wasteful number, since it uses less digits than its factorization.

1272201767520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2650420367 (or 2650420359 counting only the distinct ones).

The product of its (nonzero) digits is 164640, while the sum is 42.

The spelling of 1272201767520 in words is "one trillion, two hundred seventy-two billion, two hundred one million, seven hundred sixty-seven thousand, five hundred twenty".