1272500249851 has 4 divisors (see below), whose sum is σ = 1272505404672. Its totient is φ = 1272495095032.

The previous prime is 1272500249849. The next prime is 1272500249873. The reversal of 1272500249851 is 1589420052721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1272500249851 - 2¹ = 1272500249849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1272500249831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2187460 + ... + 2707393.

It is an arithmetic number, because the mean of its divisors is an integer number (318126351168).

Almost surely, 2^{1272500249851} is an apocalyptic number.

1272500249851 is a deficient number, since it is larger than the sum of its proper divisors (5154821).

1272500249851 is an equidigital number, since it uses as much as digits as its factorization.

1272500249851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5154820.

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 1272500249851 in words is "one trillion, two hundred seventy-two billion, five hundred million, two hundred forty-nine thousand, eight hundred fifty-one".