1279158738001 has 9 divisors (see below), whose sum is σ = 1282941751899. Its totient is φ = 1275386856336.

The previous prime is 1279158737981. The next prime is 1279158738019. The reversal of 1279158738001 is 1008378519721.

The square root of 1279158738001 is 1130999.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1041818283025 + 237340454976 = 1020695^2 + 487176^2 .

It is not a de Polignac number, because 1279158738001 - 2¹³ = 1279158729809 is a prime.

It is a super-2 number, since 2×1279158738001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1279158738001.

It is not an unprimeable number, because it can be changed into a prime (1279158738031) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 433171141 + ... + 433174093.

Almost surely, 2^{1279158738001} is an apocalyptic number.

1279158738001 is the 1130999-th square number.

1279158738001 is the 565500-th centered octagonal number.

It is an amenable number.

1279158738001 is a deficient number, since it is larger than the sum of its proper divisors (3783013898).

1279158738001 is an frugal number, since it uses more digits than its factorization.

1279158738001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6672 (or 3336 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 52.

The spelling of 1279158738001 in words is "one trillion, two hundred seventy-nine billion, one hundred fifty-eight million, seven hundred thirty-eight thousand, one".