1273649144039 has 4 divisors (see below), whose sum is σ = 1292658832824. Its totient is φ = 1254639455256.

The previous prime is 1273649144023. The next prime is 1273649144041. The reversal of 1273649144039 is 9304419463721.

It is a happy number.

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 1273649144039 - 2⁴ = 1273649144023 is a prime.

It is a super-2 number, since 2×1273649144039² (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 (1273649144539) 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, 9504844292 + ... + 9504844425.

It is an arithmetic number, because the mean of its divisors is an integer number (323164708206).

Almost surely, 2^{1273649144039} is an apocalyptic number.

1273649144039 is a deficient number, since it is larger than the sum of its proper divisors (19009688785).

1273649144039 is an equidigital number, since it uses as much as digits as its factorization.

1273649144039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19009688784.

The product of its (nonzero) digits is 3919104, while the sum is 53.

The spelling of 1273649144039 in words is "one trillion, two hundred seventy-three billion, six hundred forty-nine million, one hundred forty-four thousand, thirty-nine".