1272826658125 has 40 divisors (see below), whose sum is σ = 1754613843840. Its totient is φ = 915290640000.

The previous prime is 1272826658101. The next prime is 1272826658141. The reversal of 1272826658125 is 5218566282721.

It is not a de Polignac number, because 1272826658125 - 2⁷ = 1272826657997 is a prime.

It is a super-3 number, since 3×1272826658125³ (a number of 37 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 428229 + ... + 1651978.

It is an arithmetic number, because the mean of its divisors is an integer number (43865346096).

Almost surely, 2^{1272826658125} is an apocalyptic number.

It is an amenable number.

1272826658125 is a deficient number, since it is larger than the sum of its proper divisors (481787185715).

1272826658125 is an equidigital number, since it uses as much as digits as its factorization.

1272826658125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2080327 (or 2080312 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 55.

The spelling of 1272826658125 in words is "one trillion, two hundred seventy-two billion, eight hundred twenty-six million, six hundred fifty-eight thousand, one hundred twenty-five".