1272501131445 has 64 divisors (see below), whose sum is σ = 2353026170880. Its totient is φ = 651760948800.

The previous prime is 1272501131399. The next prime is 1272501131449. The reversal of 1272501131445 is 5441311052721.

1272501131445 is a `hidden beast` number, since 1 + 2 + 7 + 2 + 501 + 1 + 3 + 144 + 5 = 666.

It is not a de Polignac number, because 1272501131445 - 2¹¹ = 1272501129397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272501131449) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 612309 + ... + 1708778.

It is an arithmetic number, because the mean of its divisors is an integer number (36766033920).

Almost surely, 2^{1272501131445} is an apocalyptic number.

1272501131445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1272501131445 is a deficient number, since it is larger than the sum of its proper divisors (1080525039435).

1272501131445 is a wasteful number, since it uses less digits than its factorization.

1272501131445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2321263 (or 2321257 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The spelling of 1272501131445 in words is "one trillion, two hundred seventy-two billion, five hundred one million, one hundred thirty-one thousand, four hundred forty-five".