1275127640269 has 4 divisors (see below), whose sum is σ = 1457288731744. Its totient is φ = 1092966548796.

The previous prime is 1275127640263. The next prime is 1275127640287. The reversal of 1275127640269 is 9620467215721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1275127640269 is a prime.

It is a super-2 number, since 2×1275127640269² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275127640263) 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, 91080545727 + ... + 91080545740.

It is an arithmetic number, because the mean of its divisors is an integer number (364322182936).

Almost surely, 2^{1275127640269} is an apocalyptic number.

It is an amenable number.

1275127640269 is a deficient number, since it is larger than the sum of its proper divisors (182161091475).

1275127640269 is an equidigital number, since it uses as much as digits as its factorization.

1275127640269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182161091474.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The spelling of 1275127640269 in words is "one trillion, two hundred seventy-five billion, one hundred twenty-seven million, six hundred forty thousand, two hundred sixty-nine".